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Notice
In a continuing effort to improve the quality of our products, technical and environmental information in this document is subject to change without notice. This manual and any examples contained herein are provided "as is" and are subject to change without notice. Hewlett-Packard Company makes no warranty of any kind with regard to this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard Co. shall not be liable for any errors or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual or the examples herein. Consumer transactions in Australia and the United Kingdom: The above disclaimers and limitations shall not apply to Consumer transactions in Australia and the United Kingdom and shall not affect the statutory rights of Consumers. Copyright Hewlett-Packard Company 1999. All rights reserved. Reproduction, adaptation, or translation of this manual is prohibited without prior written permission of Hewlett-Packard Company, except as allowed under the copyright laws. The programs that control this product are copyrighted and all rights are reserved. Reproduction, adaptation, or translation of those programs without prior written permission of Hewlett-Packard Co. is also prohibited. Portions of the programs that control this product may also be copyrighted by Microsoft Corporation, SystemSoft Corp., Crystal Semiconductor Corporation, Phoenix Technologies, Ltd., and NeoMagic, Inc. See the individual programs for additional copyright notices. Microsoft, MS, MS-DOS, and Windows are registered trademarks of Microsoft Corporation. Pentium and the Intel Inside logo are U.S. registered trademarks and MMX is a U.S. trademark of Intel Corporation. TrackPoint is a U.S. registered trademark of Intl. Business Machines. All certifications may not be completed at product introduction. Check with your HP reseller for certification status. This equipment is subject to FCC rules. It will comply with the appropriate FCC rules before final delivery to the buyer. Hewlett-Packard Company Mobile Computing Division 19310 Pruneridge Ave. Cupertino, CA 95014, U.S.A.

Edition History
Edition 1.............................. July 1999 Edition 2.........................January 2000

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HP OmniBook XE2

Contents
Product Information ..................................................................................................... 1-1
Features and Operation.................................................................................................................. 1-2 Turning the OmniBook On and Off ....................................................................................... 1-4 Checking the Status of the OmniBook ................................................................................... 1-6 Using Fn Hot Keys ................................................................................................................. 1-7 Resetting the OmniBook ........................................................................................................ 1-7 System Resources................................................................................................................... 1-8 Specifications .............................................................................................................................. 1-10 Internal Design ............................................................................................................................ 1-12

Removal and Replacement ........................................................................................... 2-1
Removing the Battery (User-Replaceable) .................................................................................. 2-3 Removing a RAM Board (User-Replaceable) .............................................................................. 2-4 Removing the Hard Disk Drive (User-Replaceable)..................................................................... 2-6 Replacing Small Parts (User-Replaceable) ................................................................................... 2-7 Removing the Fan (HP Authorized Service Providers Only) ....................................................... 2-8 Removing the Keyboard (HP Authorized Service Providers Only) ............................................. 2-9 Removing the Display Assembly (HP Authorized Service Providers Only).............................. 2-11 Removing the LCD Module (HP Authorized Service Providers Only)...................................... 2-12 Removing the Top Case (HP Authorized Service Providers Only) ............................................ 2-15 Removing the CPU and Motherboard (HP Authorized Service Providers Only)...................... 2-17 Removing Other Components (HP Authorized Service Providers Only)................................... 2-21

Troubleshooting and Diagnostics ................................................................................. 3-1
Troubleshooting ............................................................................................................................ 3-2 Troubleshooting the Problem ................................................................................................. 3-2 Verifying the Repair ............................................................................................................... 3-3 Suggestions for Troubleshooting............................................................................................ 3-4 Diagnostic Tools ......................................................................................................................... 3-11 OmniBook Diagnostic Program ........................................................................................... 3-11 Power-On Self-Test .............................................................................................................. 3-16 Desktop Management Interface (DMI) ................................................................................ 3-20 BIOS Setup Utility ............................................................................................................... 3-22

Replaceable Parts .......................................................................................................... 4-1 Reference Information .................................................................................................. 5-1
Password Removal Policy ............................................................................................................. 5-1 Hewlett-Packard Display Quality Statement................................................................................. 5-2 OmniBook XE Technology Codes........................................................................

HP OmniBook XE2

iii

Figures
Figure 1-1. OmniBook Front View...................................................................................................... 1-2 Figure 1-2. OmniBook Side View ....................................................................................................... 1-2 Figure 1-3. OmniBook Bottom View .................................................................................................. 1-3 Figure 1-4. OmniBook Rear View....................................................................................................... 1-3 Figure 1-5. OmniBook Status Lights ................................................................................................... 1-4 Figure 1-6. Replaceable Module Diagram......................................................................................... 1-12 Figure 2-1. Removing the Battery........................................................................................................ 2-3 Figure 2-2. Removing the RAM Module Cover .................................................................................. 2-4 Figure 2-3. Releasing the RAM Module Latches ................................................................................ 2-5 Figure 2-4. Removing the Hard Disk Drive......................................................................................... 2-6 Figure 2-5. Removing the Keyboard Cover and Screws ..................................................................... 2-9 Figure 2-6. Installing the Keyboard ................................................................................................... 2-10 Figure 2-7. Removing the Display Assembly.................................................................................... 2-11 Figure 2-8. Removing the LCD Module............................................................................................ 2-13 Figure 2-9. Removing the Top Case .................................................................................................. 2-15 Figure 2-10. Detaching the Bottom Case........................................................................................... 2-16 Figure 2-11. Removing the CPU and Motherboard........................................................................... 2-18 Figure 3-1. Basic Troubleshooting Steps............................................................................................. 3-2 Figure 3-2. OmniBook Diagnostic Screens, Basic and Advanced .................................................... 3-11 Figure 3-3. Serial and Parallel Loopback Connectors ....................................................................... 3-13 Figure 4-1. Exploded View (Except Display Components) ................................................................ 4-2 Figure 4-2. Exploded View (Display Components)............................................................................. 4-3 Figure 4-3. Exploded View (Motherboard Components) .................................................................... 4-4

Tables
Table 1-1. OmniBook XE2 .................................................................................................................. 1-1 Table 1-2. Activating Power Modes .................................................................................................... 1-5 Table 1-3. Status Lights (LED PCA) ................................................................................................... 1-6 Table 1-4. Fn Hot Keys........................................................................................................................ 1-7 Table 1-5. System Interrupts................................................................................................................ 1-8 Table 1-6. System Memory.................................................................................................................. 1-8 Table 1-7. System Input/Output Addresses (100-3FF)........................................................................ 1-9 Table 1-8. DMA Channels ................................................................................................................... 1-9 Table 1-9. OmniBook XE2 Specifications ........................................................................................ 1-10 Table 1-10. Functional Structure ....................................................................................................... 1-13 Table 2-1. Removal Cross-Reference .................................................................................................. 2-1 Table 2-2. Required Equipment ........................................................................................................... 2-2 Table 2-3. Recommended Screw Torques ........................................................................................... 2-2 Table 2-4. RAM Board Replacement Part Numbers ........................................................................... 2-4 Table 2-5. Hard Disk Drive Replacement Part Number ...................................................................... 2-6 Table 2-6. Replacing Small Parts (User-Replaceable)......................................................................... 2-7 Table 2-7. Removing Display Components....................................................................................... 2-21 Table 2-8. Removing Top Case Components .................................................................................... 2-21 Table 2-9. Removing Bottom Case Components............................................................................... 2-21 Table 3-1. Scope of Diagnostic Tools.................................................................................................. 3-4 Table 3-2. Troubleshooting Suggestions ............................................................................................. 3-5 Table 3-3. OmniBook Diagnostic Error Codes.................................................................................. 3-13 Table 3-4. POST Terminal-Error Beep Codes................................................................................... 3-17 Table 3-5. POST Messages................................................................................................................ 3-17 Table 3-6. BIOS Setup Menus and Parameters.................................................................................. 3-22

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HP OmniBook XE2

Table 4-1. OmniBook XE Replaceable Parts....................................................................................... 4-5 Table 4-2. Accessory Replaceable Parts .............................................................................................. 4-8 Table 4-3. HP Part Number Reference ................................................................................................ 4-9 Table 4-4. Quanta Part Number Reference ........................................................................................ 4-12 Table 5-1. OmniBook XE LCD Guidelines (TFT) .............................................................................. 5-2

HP OmniBook XE2

v

Introduction
This service manual provides reference information for the HP OmniBook XE2. It is intended to be used by HP-authorized service personnel in the installation, servicing, and repair of this product. The manual is designed as a self-paced guide. It is intended to train you to install, configure, and repair OmniBook computers. You can follow this manual without having equipment available. The following table lists additional places where you can get supplementary information about OmniBook products.
Sources of OmniBook Information
Source HP External Web Address or Number http://www.hp.com/omnibook (http://www.europe.hp.com/omnibook, European mirror) http://partner.americas.hp.com http://www.hp.com.au Comments No usage restriction.

HP US Reseller Web HP Asia Pacific Channel Support Centre for DPSP Partners America Online (AOL)

Restricted to Authorized Resellers only. Restricted to DPSP Partners only.

Keyword: HP

HP Bulletin Board Service HP Support Assist CD-ROM Microsoft Web +1 (800) 457-1762 +1 (801) 431-1587 http://www.microsoft.com

Call +1 (800) 827-6364 for AOL membership within the US or consult the AOL website, www.aol.com, for other local phone numbers. Refer to the latest Product Support Plan for non-US BBS numbers. US and Canada. Outside US and Canada. Information and updates for Windows operating systems.

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HP OmniBook XE2

The HP OmniBook XE2 provides desktop performance and expandability as well as convenient portability. It uses high-performance component technologies that make it capable of replacing a desktop computer or serving as a portable multimedia presentation tool.
Table 1-1. OmniBook XE2
OmniBook Product F1756W #AB2 F1755W #AB2 F1779D #AB2 F1774W #AB2 F1775W #AB2 F1962W #AB2 F1671N #ABJ F1672W #ABJ F1673W #ABJ CPU Pentium II 366 MHz Pentium II 333 MHz Display 13.3-inch TFT 12.1-inch SVGA TFT Hard Drive 6.0 GB 4.0 GB Floppy Drive 1.44 MB Multimedia Drive 24X CD-ROM Standard RAM 64 MB 32 MB

Pentium II 366MHz Pentium II 400MHz Celeron 433 MHz Celeron 466 MHz

64 MB 14.1-inch XGA TFT 12.1-inch SVGA TFT 14.1-inch XGA TFT 6.0 GB 4.0GB 6.0 GB 6X DVD 24X CD-ROM 32MB 128 MB 64 MB 12.1-inch SVGA TFT 4.0 GB

This chapter describes Features and operation (page 1-2). Specifications (page 1-10). Internal design (page 1-12).

HP OmniBook XE2

Product Information

1-1

Features and Operation
The following five illustrations point out the main external features of the computer. They are followed by highlights of the computer's operation. For an internal, exploded view, see page 4-2.

Figure 1-1. OmniBook Front View
1 2 3 4 5 6 Latch to open the OmniBook Built-in microphone Blue power button Status lights Built-in speakers Touch pad (pointing device) 7 8 9 10 11 12 Click buttons CD player power (on selected models) CD player buttons (on selected models) CD-ROM drive Kensington lock slot (security connector) Modem phone jack (on selected models)

Figure 1-2. OmniBook Side View
13 14 15 PC Card eject buttons PC Card and CardBus slots (upper and lower) Floppy disk drive

1-2

Product Information

HP OmniBook XE2

Figure 1-3. OmniBook Bottom View
16 17 18 19 System-off button Hard disk drive latch and locking screw Hard disk drive RAM expansion cover 20 21 22 Battery latch Battery Port replicator connector

Figure 1-4. OmniBook Rear View
1 2 3 4 5 Parallel port Serial port VGA port (external monitor) Audio out (external speaker) Microphone jack 6 7 8 9 Infrared port USB port PS/2 port AC adapter jack

HP OmniBook XE2

Product Information

1-3

Figure 1-5. OmniBook Status Lights
1 2 3 4 5 Power AC connected Battery Caps Lock Num Lock 6 7 8 9 Scroll Lock Floppy disk drive access Hard disk drive access CD-ROM access

Turning the OmniBook On and Off
On. Press the blue power button to turn on the OmniBook. Suspend. Click Start, Suspend (Windows 95) or press the blue power button briefly (about 1 second) to suspend activity when the OmniBook is on. When you turn on the computer, it resumes your previous work session. Closing the lid (for more than 2 seconds) also suspends the computer. Hibernate. Press Fn+F5. This is like Off, except that your current work session is first saved to disk. When you turn on the computer, it reboots and restores your previous session. Off. Click Start, Shut Down. If the OmniBook does not respond, press and hold the blue power button until the display shuts down. When you turn on the computer, it reboots. Unsaved data is lost.

1-4

Product Information

HP OmniBook XE2

Table 1-2. Activating Power Modes
Power Mode Suspend Low-power/stopped state. Everything is off or in a low-power state. Network devices are off. Your previous work session resumes at turn-on. For plug-and-play operating systems, network connections resume at turn-on. To Enter Mode Press blue power button for about 1 second or click Start, Shut Down, Standby (Windows 98) or click Start, Suspend (Windows 95) or allow time-out. Press Fn+F5 or allow time-out. To Turn Back On Press blue power button to display the current session ("Instant-On").

Hibernate No-power/stopped state. Session is saved on the hard disk. Everything is shut down. Computer reboots at turn-on and restores previous session and network connections (if plug-and-play). Off No-power/stopped state. Everything is shut down (battery continues charging if AC adapter is connected). Computer reboots at turn-on and restores network connections.

Press blue power button to restart and restore the previous session. Press blue power button to restart with a new session.

Click Start, Shut Down or Press and hold the blue power button until the display shuts down.

HP OmniBook XE2

Product Information

1-5

Checking the Status of the OmniBook
The OmniBook status lights, located on the keyboard cover (the display bezel above the keyboard), indicate power status and drive activity. These lights are on the LED PCA.
Table 1-3. Status Lights (LED PCA)
Icon No icon (Light next to blue button) Meaning Power Steady green light: OmniBook is running (On mode). Slowly blinking green light: OmniBook is suspended to RAM (Suspend or Standby mode). No light: OmniBook is off (Off or Hibernate mode). AC connected Green light: AC power is connected. Battery Green light: Battery is full or stopped charging. Orange light: Battery is charging. No light: AC adapter is not connected or battery is not present. Floppy disk drive access Green light: OmniBook is accessing the floppy disk drive Hard disk drive access Green light: OmniBook is accessing the hard disk drive. CD-ROM drive access Green light: OmniBook is accessing the CD-ROM drive. Caps Lock Green light: Caps Lock is active. Num Lock Green light: Num Lock is active. Scroll Lock Green light: Scroll Lock is active.

The built-in microphone is to the right of the power light, next to its icon:

1-6

Product Information

HP OmniBook XE2

Using Fn Hot Keys
The Fn key combined with another key is a hot key--a shortcut key sequence for various system controls. For an external keyboard, CTRL+ALT is normally equivalent to the Fn key.
Table 1-4. Fn Hot Keys
Hot Key Fn + F1 Fn + F2 Fn + F3 Fn + F4 Fn + F5 Fn + F6 Fn + F12 Fn + NumLock Fn + UP ARROW Fn + DOWN ARROW Effect Decreases the display's contrast (DSTN displays only). Increases the display's contrast (DSTN displays only). Enters Suspend mode (Windows 98); enters Standby mode (Windows 95, Windows NT). Enters Suspend mode. Enters Hibernate mode. Toggles the sound on and off (mutes sound). Switches among the built-in display, an external display, and simultaneous displays. Toggles Scroll Lock on and off. Increases and decreases the sound volume.

Resetting the OmniBook
1. Use a pen or a straightened paper clip to push the system-off button on the bottom of the OmniBook. (The switch is on the motherboard.) or Press and hold the blue power button until the display shuts down. (The switch is on the I/O PCA.) 2. After the computer shuts down, press the blue power button to turn it back on.
Note The OmniBook can boot from a CD if both of these conditions are true: You have a bootable CD in the drive, such as the OmniBook Recovery CD, and You select the CD-ROM drive as the boot device. You can do this during reboot by pressing ESC to cancel the OmniBook screen, then ESC to display the boot-device menu for a onetime selection.

HP OmniBook XE2

Product Information

1-7

System Resources
Below are default values for system resources. To see other, non-default possibilities, use the BIOS Setup utility (see page 3-22), which lists port and audio device configurations in the System Devices menu. The tables in this section show typical resource usage as set up by the OmniBook BIOS. Plug-andplay operating systems, drivers, and BIOS Setup settings may change some of the entries.
Table 1-5. System Interrupts
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 System timer Keyboard Cascade from secondary interrupt controller Free (or COM2, IrDA port, if enabled) COM1 (serial port) Audio Floppy disk drive LPT1 (ECP parallel port) Real-time clock Free in APM mode (SCI in ACPI mode) PCI IRQ (shared by all PCI devices) Free (or MIDI, if enabled). Touch pad, PS/2 mouse Numeric coprocessor Internal hard disk drive (primary IDE controller) Internal CD-ROM drive (secondary IDE controller)

Table 1-6. System Memory
00000 - 9FFFF A0000 BFFFF C0000 - CFFFF D0000 - DBFFF DC000 - FFFFF System memory Video Video BIOS Free (valid uses: upper memory blocks (UMBs) or PC Card memory windows) System BIOS

1-8

Product Information

HP OmniBook XE2

Table 1-7. System Input/Output Addresses (100-3FF)
170-177 1F0-1F7 220-22F 376 378-37F 388-38B 3B0-3BB 3C0-3DF 3E0-3E1 3F0-3F5 3F6 3F7 3F8-3FF Internal CD-ROM drive (secondary IDE controller) Internal hard disk drive (primary IDE controller) DOS games (FM decoding) Internal CD-ROM drive (secondary IDE controller) LPT1 (printer port) DOS games (FM decoding) VGA adapter VGA adapter PCMCIA controller Floppy disk drive controller Internal hard disk drive (primary IDE controller) Floppy disk drive controller COM1 (serial port)

Table 1-8. DMA Channels
0 1 2 3 4 5 6 7 Free LPT1 (ECP parallel port) Floppy disk drive Fast IR (if enabled) Cascade from secondary PMA controller Free Free Free

HP OmniBook XE2

Product Information

1-9

Specifications
The following tables list descriptions for the OmniBook.
Table 1-9. OmniBook XE2 Specifications
Physical Attributes Processor and Bus Architecture Size: 311mm249mm42mm (12.24"9.80"1.64") closed. Weight: 3.0 kg (6.6 lb.). 333, 366, 400-MHz Intel Pentium II processor or 433, 466-MHz Celeron processor MMX technology. 2.5-V low-power processor. 128-KB OR 256-KB built-in L2 cache. 32-bit PCI bus. 13.3", 12.1", or 14.1" active-matrix (TFT) display. XGA or SVGA resolution. SMI LynxE SM811 graphics controller with 2-MB 135-MHz SGRAM or SMI Lynx EM4 w/AGP and 4MB video memory Zoomed Video support for lower PC Card slot (Windows 95 and Windows 98 only). Dual-monitor support. Rechargeable 8-cell lithium ion battery (14.4 Vdc, 3.2 AH, 46 watt-hours) 3.12 hours battery life time. Fast battery recharge: 80% in 1.6 hours, 100% in 2.1 hours. Low-battery warning. Suspend/resume capability. 60-watt AC adapter: 115 to 230 Vac (47 to 63 Hz) input, 19 Vdc, 3.16 A output. 24X CD-ROM drive or 6X DVD 1.44MB floppy disk drive. 4.0-GB or 6.0-GB hard disk drive. 32-128MB SDRAM SDRAM preinstalled. Two slots for RAM expansion up to 256 MB maximum. 16-bit, Sound Blaster Pro-compatible. ESS M-2EM or ESS M3E PCI audio 64-voice wavetable synthesizer. Stereo sound via two built-in speakers. Built-in microphone. Stereo line-in and monophonic microphone-in jacks. ZV port audio interface. 87/88-key touch-type keyboard with 101/102 key emulation. Embedded numeric keypad. 12 function (Fn) keys. Touch pad pointing device. 56Kbps (V.90) data speed maximum. 14.4Kbps fax speed, Class 1 and 2. Universal serial bus (USB). 9-pin, 115,200-bps serial (16550 UART). 25-pin bi-directional ECP/EPP parallel. Video out: 80060016M or 1024x768x64K colors at 75-Hz refresh rate. PS/2 keyboard/mouse port. IrDA 1.1 (Fast IR) infrared port. One Type III or two Type II 16-/32-bit PC Card slots (3.3- and 5-V support). CardBus enabled. Lower slot supports Zoomed Video (Windows 95 and Windows 98 only). Optional port replicator.

Graphics

Power

Storage

RAM Audio System

Keyboard and Pointing Device Modem Input/Output

Expandability

1-10

Product Information

HP OmniBook XE2

Software

Security Features Environmental Limits

Major ICs

Microsoft Windows 95 OR Microsoft Windows 98 OR Microsoft Windows NT 4.0. Windows-compatible Plug-and-Play. Power management. VirusScan. Adobe Acrobat Reader. My Yahoo! HP diagnostic tests. Online documentation. Electronic registration. OmniBook Recovery CD(s) included. Phoenix Card Executive (Windows NT 4.0 only) Centralized worldwide BIOS and driver update service. User and supervisor passwords. Kensington Microsaver lock slot. Operating temperature: 5 to 35 C (41 to 95 F). Operating humidity: 20 to 80 percent RH. Storage temperature: 20 to 60 C (4 to 140 F). Storage humidity: 8 to 90 percent RH. CPU: Intel Pentium II or Celeron North Bridge: 443DX or 443ZXM-66 South Bridge: PIIX4e or PIIX4m Video: SMI LynxE SM811 or SMI Lynx EM4 SM710-4 Audio: ESS M-2EM or ESS M3E CardBus: TI PCI1225. Keyboard controller: National PC87570. Super I/O: National 97338.

For information on accessories and accessory replaceable parts, see the Support publication "Express Support Material Program for the OmniBook XE Series PC."

HP OmniBook XE2

Product Information

1-11

Internal Design
The motherboard PCA is the central component of the OmniBook design. It plays a role in virtually all system functions. The CPU module and most other subsystems connect to the motherboard. The following figure shows the connections among the replaceable electrical modules. As a substitute for a functional block diagram, see the table on page 1-13--it lists the roles that the replaceable modules play in each of the functional subsystems.

Figure 1-6. Replaceable Module Diagram

1-12

Product Information

HP OmniBook XE2

Table 1-10. Functional Structure
Bootup CPU module Motherboard BIOS IC Floppy disk module Hard disk drive CPU module Motherboard RAM board Battery Motherboard AC adapter Motherboard LCD module Inverter PCA Motherboard Hard disk drive Motherboard Floppy disk module Motherboard BIOS IC Keyboard Motherboard Touch pad Motherboard LED PCA Speakers Motherboard LED PCA Motherboard Modem PCA Motherboard Modem PCA Motherboard LED PCA Motherboard LED PCA Motherboard LED PCA Motherboard Motherboard PCMCIA socket Main processor (MMO). Primary system circuitry. Code for basic system functions. First source of disk-based startup code. Second source of disk-based startup code. Main processor, numeric data processor, L1 and L2 cache. Primary system circuitry. Optional, additional RAM. Power storage. AC adapter socket, power switch, lid switch, system-off switch, power supply. AC-to-DC converter. PCMCIA/zoomed video controller. Display output, backlight. Power converter for backlight. Hard disk controller. Hard disk mechanism. Floppy disk controller. Floppy disk mechanism. Keyboard controller. Keyboard BIOS. Key switches. Keyboard controller. Touch pad sensor, controller (PS/2 output). Audio controller, speaker amplifier, headphone amplifier, zoomed video controller, mute switch. External audio jacks. Speakers. Keyboard controller. Power LEDs. I/O controller. Serial connector. I/O controller Parallel connector. I/O controller. Infrared transmitter/receiver. Keyboard controller, PS/2 processor PS/2 connector. Bus controller (South Bridge) USB connector. Docking logic, docking connector. PCMCIA controller. PCMCIA connectors.

Processor Memory Power

Display

Hard disk drive Floppy disk drive Keyboard

Pointer Audio

Status Serial Parallel Infrared PS/2 port USB Docking port PCMCIA

HP OmniBook XE2

Product Information

1-13

This chapter tells you how to remove and replace the following components and assemblies. A bullet () indicates that an item is user-replaceable.
Table 2-1. Removal Cross-Reference

Battery (page 2-3). Bottom case (table on page 2-21). CD-ROM drive (table on page 2-21). CPU module (page 2-17) Display bezel (table on page 2-21). Display case (table on page2-21). Fan (page 2-7). Floppy disk drive (table on page 2-21). Foot (table on page 2-7). Hard disk drive (page 2-6). Heatsink (table on page 2-21). Hinge (table on page 2-21).

Hinge cover (table on page 2-21). Inverter PCA (table on page 2-21). LED PCA (table on page 2-21). Keyboard (page 2-9). LCD brackets (table on page 2-21). LCD flex cable (table on page 2-21). LCD module (page 2-21). Motherboard (page 2-17). RAM board (page 2-3). RAM module cover (table on page 2-7). Top case (page 2-15).

Caution
Always provide proper grounding when performing repairs. Without proper grounding, an electrostatic discharge may damage the OmniBook and its components.

Note Reassembly steps are the reverse of the removal steps. Reassembly notes are included at the end of each section. There are some removal and replacement procedures that differ between Omnibook XE2 technologies. Refer to the Technology Code description in section 5.3 for details. The Technology Code (e.g DD) will be referenced in the procedures in order to identify these differences.

HP OmniBook XE2

Removal and Replacement

2-1

Table 2-2. Required Equipment Small Phillips screwdriver, preferably magnetized. 5 mm hex driver. Pointed knife or probe. Small flat-blade screwdriver. uPGA-1 CPU removal tool (Technology Code DD)
Table 2-3. Recommended Screw Torques
Screw Thread Size M2 M2.5 (45 mm long) M2.5 (1619 mm long) M3 Torque (kgfcm) 1.3 1.8 3.0 3.5 2.5 3.0 3.0 3.5 Torque (lbfin) 1.1 1.5 2.6 3.0 2.2 2.6 2.6 3.0

2-2

Removal and Replacement

HP OmniBook XE2

Removing the Battery
(User-Replaceable)
Carefully read the following information.

Caution
Do not mutilate, puncture, or dispose of batteries in fire or water. A battery can burst or explode, releasing hazardous chemicals. A rechargeable battery must be recycled or disposed of properly. When discarding a battery, contact the local waste disposal provider regarding local restrictions on the disposal or recycling of batteries. To avoid risk of fire, burns, or damage to the battery, do not allow a metal object to touch the battery contacts. The battery is suitable for use only with compatible OmniBook models. Do not disassemble. There are no serviceable parts inside. Handle a damaged or leaking battery with extreme care. If you come in contact with the electrolyte, wash the exposed area with soap and water. If it contacts the eye, flush the eye with water for 15 minutes and seek medical attention. Do not expose the batteries to high storage temperatures (above 60 C, 140 F). Required Equipment

None.
Removal Procedure

1. Unplug the AC adapter, if present. 2. Turn the notebook bottom side up. 3. Push the blue latch in the direction of the arrow (to your left) and lift out the battery.

Figure 2-1. Removing the Battery Reassembly Notes

Snap the battery back into place. Charge the battery by connecting the AC adapter to the OmniBook.

HP OmniBook XE2

Removal and Replacement

2-3

Removing a RAM Board
(User-Replaceable)
The OmniBook XE2 has 64 MB of RAM on the motherboard and has one RAM slot for installing additional RAM.
Table 2-4. RAM Board Replacement Part Numbers
Description RAM board, 32-MB SDRAM RAM board, 64-MB SDRAM RAM board, 128-MB SDRAM Product Number F1456A F1457A F1622A

The OmniBook's computer chips are extremely static-sensitive. Static electricity can permanently damage computer chips. Carefully read the following information. Caution
Handle the RAM module only by its edges. Otherwise, you may damage the module due to electrostatic discharge. Static electricity can permanently damage computer chips. It is therefore important to discharge the static electricity from your body before installing the memory module. Discharge your body's electricity by touching the metal shielding around the connectors on the rear of the OmniBook computer. Required Equipment

Small Phillips screwdriver.
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Remove the RAM cover located on the bottom of the OmniBook using a Phillips screwdriver.

Figure 2-2. Removing the RAM Module Cover

2-4

Removal and Replacement

HP OmniBook XE2

3. Release the two latches at the sides of the RAM module by pushing them gently outward, away from the sides of the module. The free edge of the module pops up. 4. Pull the module out of the connector. Handle it only by the edges.

Figure 2-3. Releasing the RAM Module Latches

Reassembly Notes

Insert the RAM board into the connector at about a 30 angle until it is fully inserted. Then press down at both sides until both latches snap closed.

HP OmniBook XE2

Removal and Replacement

2-5

Removing the Hard Disk Drive
(User-Replaceable)
Table 2-5. Hard Disk Drive Replacement Part Number
Description Drive, hard disk (6.0GB) Part Number F1753-60975 Exchange Part Number F1753-69075

Required Equipment

Small Phillips screwdriver.
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Turn the notebook bottom side up. 3. Use a Phillips screwdriver to remove the hard disk drive locking screw. 4. Slide and hold the hard disk drive latch. This releases the hard disk drive. 5. Slide the hard disk drive to the left, then lift it out.

Figure 2-4. Removing the Hard Disk Drive

6. If you are installing a new hard drive that does not have a cover, you can remove the cover parts from the old hard drive: Remove the six screws from the case, carfully pull back the case prong, and lift out the drive.
Reassembly Notes

Caution
Do not cover the vent hole in the top surface of the hard drive. If you cover the hole, the hard drive could fail prematurely.

Create a Hibernate partition on the drive before loading any software. See the instructions included with the drive or go to the OmniBook website at www.hp.com/omnibook. Create a partition the size of the default option.

2-6

Removal and Replacement

HP OmniBook XE2

Replacing Small Parts
(User-Replaceable)
The following small parts are user-replaceable.
Table 2-6. Replacing Small Parts (User-Replaceable)
Part Feet RAM Module Cover Replacement Procedure Insert a small flat-blade screwdriver or pointed knife under the foot and pry it loose. To replace, firmly press the adhesive side of the foot into the recess. On the bottom of the unit, remove the screw from the RAM module cover and remove the cover (see page 2-4).

HP OmniBook XE2

Removal and Replacement

2-7

Removing the Fan
(HP Authorized Service Providers Only)
Required Equipment

Small Phillips screwdriver.
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Turn the computer bottom side up. 3. Using a Phillips screwdriver, remove the screw holding the fan. 4. Slide the fan assembly forward, and lift it out by the rear edge. 5. Carefully unplug the cable connector.

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Removal and Replacement

HP OmniBook XE2

Removing the Keyboard
(HP Authorized Service Providers Only)
Required Equipment

Small Phillips screwdriver. Plastic knife or small flat-blade screwdriver.
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Use a plastic knife or small flat-blade screwdriver to gently pry up the right side of the keyboard cover. Remove the keyboard cover by pulling it to your right.

Caution
If you use a screwdriver to remove the keyboard cover, avoid scratching the plastic.

3. Use a Phillips screwdriver to remove the three screws.

Figure 2-5. Removing the Keyboard Cover and Screws

4. Lift up the edge of the keyboard that is closest to the display until it forms a 30 angle to the base, then gently pull it out toward the rear. 5. Disconnect the flex cable from the base by grasping both sides of the cable and gently pulling up.

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Figure 2-6. Installing the Keyboard Reassembly Notes

Lay the keyboard bottom side up on the top case, forward of its normal position, and attach the flex cable to the base. Be sure that the cable is folded neatly beneath the keyboard.

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Removal and Replacement

HP OmniBook XE2

Removing the Display Assembly
(HP Authorized Service Providers Only)
Required Equipment

Small Phillips screwdriver. Plastic knife or small flat-blade screwdriver.
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Open the display completely (180 degrees). 3. Use a plastic knife or small flat-blade screwdriver to gently pry up the right side of the keyboard cover. 4. Remove the cover by pulling it to your right. 5. Use a Phillips screwdriver to remove the four screws from the hinge covers. 6. Remove the hinge covers with your fingers. Do not use a tool. 7. Unplug the cable by grasping both ends of the connector and pulling toward you. 8. Use a Phillips screwdriver to remove the four screws from the hinges.

"Step 5" screws (4): M2.54mm

"Step 8" screws (4): M2.55mm

Figure 2-7. Removing the Display Assembly Reassembly Notes

You may need to use a flat-blade screwdriver to reconnect the cable.

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Removal and Replacement

2-11

Removing the LCD Module
(HP Authorized Service Providers Only)
Required Equipment

Small Phillips screwdriver. Pointed knife or probe.
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Remove the display assembly (page 2-11). 3. On the display bezel, using a pointed knife or probe, remove the eight upper and lower screw covers. 4. Using a Phillips screwdriver, remove the eight screws. 5. Using your fingers at each side of the bottom of the display bezel, slide the bezel toward you until it unsnaps. 6. Lift up the bottom of the bezel and lift it off. 7. Using a Phillips screwdriver, remove the four screws holding the LCD brackets and hinges near the bottom corners of the display case. 8. Remove the hinges. 9. Using a Phillips screwdriver, remove the four screws holding the LCD brackets. 10. Lift out the LCD module, including the right and left LCD brackets and the inverter PCA. (In some models, the inverter PCA is at the bottom of the LCD module; in others, to the right side.) 11. Using a Phillips screwdriver, remove the four screws holding the brackets to the LCD module. 12. Unplug the two cables from the inverter PCA. 13. Remove the four side screws holding the brackets to the LCD module.

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Removal and Replacement

HP OmniBook XE2

Screw covers Display bezel

LCD module Note: In some models, the inverter PCA is at the bottom of the LCD module.

Left LCD bracket

Inverter PCA

Hinges Right LCD bracket

Display case

Figure 2-8. Removing the LCD Module

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Removal and Replacement

2-13

Reassembly Notes

To resposition the inverter PCA, insert the plastic positioning knobs in the holes at each end of the inverter. Wrap the cable and wires around screw holes and free of the edge of the display case. Slide the display bezel toward the top until it snaps in place. Start all of the bezel screws before tightening any of them. Note that the top screw covers differ from the bottom screw covers, and that the two screw covers at the upper left and upper right are somewhat thicker than the others.

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Removal and Replacement

HP OmniBook XE2

Removing the Top Case
(HP Authorized Service Providers Only)
Required Equipment

Small Phillips screwdriver. Pointed knife or probe. Small flat-blade screwdriver.
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Remove these additional assemblies: Hard disk drive (page 2-6). Fan (page 2-7). Keyboard (page 2-9). Display assembly (page 2-11). 3. Using the Phillips screwdriver, remove four screws on the top case: two on either side of the fan location, one toward the top right, and one (recessed) next to the touch pad

Cables

Cable connectors

Figure 2-9. Removing the Top Case

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Removal and Replacement

2-15

4. Turn the case bottom side up and, with the battery compartment toward you, using the Phillips screwdriver, remove thirteen screws from the bottom case: four on the right side two in the battery compartment two to the left of the battery compartment one from the RAM module cover (also remove the RAM module cover itself) one in the hard disk drive compartment one under the upper left foot (first remove the foot with a pointed knife or probe) two recessed hinge screws
Recessed hinge screws

Upper left foot

Figure 2-10. Detaching the Bottom Case

5. Turn the unit top side up. 6. Using a small flat-blade screwdriver, slide the two cable connectors up slightly and detach the two cables from the motherboard. 7. Lift off the top case.
Reassembly Notes

Insert the thin (touch pad) cable first, since it has more flexibility than the wide (CD control PCA) cable. With the cable connectors opened slightly, insert the cables back in the cable connectors and push the connectors shut.

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Removal and Replacement

HP OmniBook XE2

Removing the CPU and Motherboard
(HP Authorized Service Providers Only)
Required Equipment

Small Phillips screwdriver. Small flat-blade screwdriver. 5-mm (3/16 inch) hex driver. uPGA-1 CPU removal tool (Technology Code DD)
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Remove these additional assemblies: Hard disk drive (page 2-6). Fan (page 2-7). Keyboard (page 2-9). Display assembly (page 2-11). Top case (page 2-15). 3. Remove the heatsink: using the Phillips screwdriver, Technology Code (DB): remove the six screws on the heatsink (including the two recessed screws marked with arrows) and lift off the heatsink. Technology Code (DD): remove the eight screws on the heatsink (inlcuding the four recessed screws) 4. Remove the floppy disk drive (on the left): Remove one screw. Using a small flat-blade screwdriver, slide the cable connector to the right slightly and detach the cable from the motherboard. Remove the drive. 5. Remove the CD-ROM drive (on the right): Remove one screw. Slide the drive to the right to detach the connector. Remove the drive. 6. Remove the CPU module / CPU Technology Code (DB): Using the Phillips screwdriver, remove the three screws and lift the module up. Technology Code (DD): Using a uPGA-1 CPU removal tool, remove the CPU from the socket. 7. Remove the LED PCA (on the left): Technology Code (DB):

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Removal and Replacement

2-17

Using the Phillips screwdriver, remove the three screws (two long screws on top and one short screw on the front left). Technology Code (DD): Using a Phillips screwdriver, remove the four screws (two long screws on top, one short screw on the top right, and one short screw on the front left). Tilt the front of the LED PCA up to detach the two connectors on the bottom. Lift the PCA out.
Heatsink

LED PCA

CPU module

Modem PCA

Floppy disk drive CD-ROM drive

Motherboard

Bottom case

Figure 2-11. Removing the CPU and Motherboard Note: Omnibook XE2-DB shown. Some details differ from Omnibook XE2-DD.

8. Remove the modem PCA (on the right): Using the Phillips screwdriver, remove the two screws.

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HP OmniBook XE2

Tilt the left of the modem PCA up to detach the connector on the bottom. Lift the PCA out. 9. Remove the motherboard: Using the Phillips screwdriver, remove the two brackets; the left bracket has two screws, and the right has three. Using the Phillips screwdriver, remove the two screws in front (on either side of the battery connector), the one screw in front of the modem PCA, and the one screw on the right side. Using the 5-mm hex driver, remove the standoff on the left side of the VGA connector. Lift the motherboard at the rear and slide it out and upward from the bottom case.
Reassembly Notes Note: Installing a New Motherboard If any RAM boards are present, transfer them from the old motherboard to the new one: Store the serial number electronically in the new motherboard--see the steps below.

When reinserting the motherboard, slip the battery connector under the front edge of the bottom case and drop in place. When reinstalling the LED PCA, tilt the PCA toward the back to slip the audio jacks into their openings, and be sure that the connectors line up on the bottom. When reinstalling the CPU module, press only on the two circles near the front edge. When reinstalling the floppy disk drive, slip the cable into the cable connector and slide the connector closed. When reinstalling the heatsink, be sure that the insulating material is intact.
Note: Installing a New Bottom Case Install a new serial number label and overlay--see the steps below. Storing the Serial Number Electronically

1. Exit Windows and boot to a DOS prompt.


For Windows 95 or Windows 98, press F8 during reboot and select Command Prompt Only. For Windows NT, boot from a DOS boot floppy disk.

2. Run ESN.EXE from one of these sources:


On a factory software installation, change to the \Omnibook\Drivers\Hputils directory and type esn at the prompt. Otherwise, copy \Omnibook\Drivers\Hputils\Esn.exe from the OmniBook XE2 Recovery CD, then run it on the OmniBook.



3. Store the serial number:


If you are prompted for the serial number, type the serial number shown on the bottom of the case. If a serial number has already been stored, you must call an HP support center to change it.



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Removal and Replacement

2-19

Installing a New Serial Number Label

If you do not have a master file that creates serial number labels, get a copy from the Reseller website (see page vi) under Product Support Information in the Service and Support Library. 1. Using any PC connected to a laser printer, open the master serial label file, enter the serial number and product number from the old serial label, and print the new label on plain white paper. The new label does not have barcodes. 2. Carefully cut out the new serial label just inside the border and place it into the inner recess in the bottom case. The bottom of the label goes toward the front of the case. 3. While holding the paper label in place, attach a serial label overlay (HP Part #7121-7525) into the outer recess. It covers and protects the serial label.

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Removal and Replacement

HP OmniBook XE2

Removing Other Components
(HP Authorized Service Providers Only)
Required Equipment

Small Phillips screwdriver. Pointed knife or probe (for display components). 5-mm hex driver (or 3/16 inch) (for bottom case components).
Removal Procedure

1. Unplug the AC adapter, if present, and remove the battery. 2. Remove the additional assemblies and follow the special steps indicated in the tables below. Components are separated into these groups: Display components. Top case components. Bottom case components.

Table 2-7. Removing Display Components
Component Display Bezel Display Case Hinge Hinge Cover Inverter PCA Removal Procedures Display (page 2-11) LCD module (page 2-12). Display (page 2-11). LCD module (page 2-12). Display (page 2-11). LCD module (page 2-12). Display (page 2-11). Display (page 2-11). LCD module (page 2-12). Display (page 2-11). LCD module (page 2-12). Display (page 2-11). LCD module (page 2-12). See page 2-12. Additional Steps (See figure on page 4-3) Remove the display bezel (page 2-12).. Remove the LCD module and brackets from the case, but do not disassemble the module (page 2-12). Remove the display bezel (page 2-12).

1. Remove the display bezel (page 2-12). 2. Unplug both cables attached to or holding the inverter PCA. Lift up the PCA if necessary.

LCD Brackets (part of LCD kit) LCD Flex Cable LCD Module

Table 2-8. Removing Top Case Components
Component Keyboard Top Case Removal Procedures See page 2-9. See page 2-15. Additional Steps

Table 2-9. Removing Bottom Case Components
Component Battery Removal Procedures See page 2-3. Additional Steps (See figures on pages 4-2, 4-4)

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Component Bottom Case

CD-ROM Drive CPU Module / CPU Fan Floppy Disk Drive Hard Disk Drive Heatsink LED PCA Modem PCA Motherboard RAM Board

Removal Procedures Keyboard (see page 2-9). Top case (see page 2-15). CPU and motherboard (see page 2-17). Keyboard (see page 2-9). Top case (see page 2-15). See page 2-17. See page 2-7. Keyboard (see page 2-9). Top case (see page 2-15). See page 2-6. Keyboard (page 2-9). Top case (see page 2-15). Keyboard (see page 2-9). Top case (see page 2-15). Keyboard (see page 2-9). Top case (see page 2-15). See page 2-17. See page 2-4.

Additional Steps (See figures on pages 4-2, 4-4) Remove heatsink, drives, PCAs, CPU module, and motherboard (page 2-17).

Remove heatsink (page 2-17). Remove heatsink (page 2-17). Remove heatsink (page 2-17).

Remove heatsink (page 2-17). Remove heatsink (page 2-17).

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HP OmniBook XE2

This chapter includes troubleshooting and diagnostic information for testing the functionality of the OmniBook and identifying faulty modules: Troubleshooting information


Troubleshooting the problem (page 3-2). Verifying the repair (page 3-3). Suggestions for troubleshooting (page 3-4).

Diagnostic tools


OmniBook hardware diagnostic program (page 3-11). Power-on self-test (page 3-16). Desktop Management Interface (page 3-20). BIOS Setup utility (page 3-22).

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Troubleshooting and Diagnostics

3-1

Troubleshooting
The suggestions in this section can help isolate and repair the cause of a problem. To ensure quality repair, HP recommends that you follow the basic troubleshooting steps shown in the illustration below.

Check the customer's description of the problem and any supporting information.

Try to duplicate the customer's problem.

Troubleshoot the problem using - Diagnostic tools. - Troubleshooting suggestions.

Verify the repair by testing the functionality of the complete unit .

Figure 3-1. Basic Troubleshooting Steps

Troubleshooting the Problem
Record pertinent information about the unit:


Model and serial number. Operating system and version. BIOS version. Accessories and peripherals used.

Analyze the problem: Observe Symptoms. Using the customer's information, try to duplicate the problem. Determine how the problem differs from proper behavior. Also, take note of the functions that do work properly. Separate Problems. If there is more than one symptom, separate them into distinct problems.

3-2

Troubleshooting and Diagnostics

HP OmniBook XE2

Consider Causes. Keep in mind possible causes for each problem. Use the diagnostic tools and troubleshooting suggestions to help find possible causes.


The OmniBook diagnostic program is the primary troubleshooting tool--it tests most components using automatic and interactive tests. The table on page 3-4 shows how you can use the different diagnostic tools to isolate the cause. The troubleshooting suggestions on page 3-5 include general suggestions for repairing units with certain failure symptoms.



Swapping easily replaced modules with known-good modules is an ideal way to isolate the cause down to the module level. It is rare for more than one module to be responsible for one failure symptom. Therefore, replacement of more than one module for a particular symptom should be the exception rather than the normal expectation. After replacing a module, it is normal for the unit to be in a confused state and lock up when power is applied. If this occurs, press the system-off button to restart the computer in a known state.

Verifying the Repair
Before returning the repaired unit to the customer, verify the repair by running the following tests: Basic Diagnostic Test. Run the basic test of the OmniBook diagnostic program (page 3-11). and Function Tests. Run tests that check the repaired function, such as in the OmniBook diagnostic program (page 3-11). and Failed Tests. Run any other tests that failed during troubleshooting.

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Suggestions for Troubleshooting
Table 3-1. Scope of Diagnostic Tools
Function Bootup Processor Memory Batteries Display Hard disk Floppy drive Keyboard Pointer Audio Serial Parallel Infrared PS/2 port USB Docking port PCMCIA AC adapter Docking products CD-ROM drive Other plug-in modules Tests ports and internal bus Tests (IDE menu) Tests (Video,
Mem,User menus)

OmniBook Diagnostics

Power-On Self-Test Tests Tests Tests

Tests (System menu) Tests (Memory menu)

Tests (IDE menu) Tests (FDD menu) Tests (KBD menu) Tests (Misc menu) Tests (System, Misc menus) Tests* (Misc menu) Tests* (Misc menu) Tests (Misc menu) Tests (KBD, Misc menus) Tests (System menu) Tests (using docks) Tests (Misc menu)

Tests Tests Tests

DMI/TopTools (if installed) Describes (SafeTools) Describes (AssetTools) Describes (AssetTools) Describes (AssetTools) Describes (AssetTools) Describes (AssetTools) Describes (AssetTools) Describes (AssetTools) Describes (AssetTools)

BIOS Setup Configures

Describes

Configures Describes

Configures Configures

Describes (AssetTools) Describes (AssetTools) Describes (AssetTools)

Configures Configures Configures

Describes (AssetTools)

Tests (with boot CD)

Describes (AssetTools) Status (AssetTools) Status (AssetTools) Describes (AssetTools) Describes (AssetTools)

Configures Configures

3-4

Troubleshooting and Diagnostics

HP OmniBook XE2

If you can't isolate the cause of a problem using the diagnostic tools, you can use the suggestions in the following table to help find the problem.
Table 3-2. Troubleshooting Suggestions
Symptom Call Center: Suggestions Repair Center: Likely Causes Repair Center: Comments

To help determine likely causes, check to see what replaceable modules are involved in the system function and what roles they play. See the table on page 1-13. Startup Does not boot on AC or battery

Check the power source. Push system-off button. Unplug the AC adapter and remove all batteries, then reconnect power. Remove any RAM board and try again. Reinsert and try again.

AC adapter. RAM board. CPU module. Motherboard. I/O PCA. LCD module. Hard drive.

Check AC adapter. Remove any RAM boards and retry. If power status light does not turn on, replace motherboard. If power status light turns on but display remains off, try external monitor. If monitor shows successful boot, replace LCD module. If monitor shows activity but BIOS does not complete, replace CPU module. If monitor is blank, replace I/O PCA, replace CPU module, replace motherboard. If power status light and display turn on, BIOS completes, but OS does not start from hard disk or from floppy drive, replace CPU module, then motherboard. If OS starts from floppy drive, reload hard drive, replace hard drive.

Does not boot on battery (boots on AC) Does not boot from floppy drive

Error message such as "Invalid system disk" or "Auto IDE error"

Sluggish startup or shutdown

Check battery level on battery LEDs. Check battery contacts. If available, try another battery. Check boot order in BIOS Setup. Check that floppy boot is enabled in BIOS Setup. Check for a disk in floppy drive. Remove and reinsert hard drive. Check boot order in BIOS Setup. Run ScanDisk and Disk Defragmenter to check and optimize the hard drive. Delete temporary and unneeded files.

Battery. Motherboard.

Floppy drive or contacts. Motherboard. Hard drive contacts. Hard drive. If unit boots from floppy drive, check for corrupt files on hard drive, reload hard drive, replace hard drive.

Use same suggestions shown at left.

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Troubleshooting and Diagnostics

3-5

Symptom Password has been forgotten

Call Center: Suggestions Verify proper ownership, then follow the removal procedure with the owner and log the appropriate data--see page 5-1. Turn down display brightness. Check power management settings in BIOS Setup. Try the default settings. Inform user that certain applications can cause excess power usage. (User can get power monitor from www.intel.com and monitor CPU load.) Some PC cards (PCMCIA) draw power even while not in use. Heavy modem use can affect battery operating time. Check battery contacts. If available, try another battery. Check the power source. Check battery contacts. If available, try another battery and AC adapter. Check for high ambient temperature and blocked air vents. Adjust display brightness. Press Fn+F12 several times. Try external monitor.

Repair Center: Likely Causes

Repair Center: Comments The user must call Technical Support and provide proof of ownership. Password removal is restricted to certain sites. See page 5-1. Battery capacity often decreases after a year or more.

Power/Battery Short battery operating time

Battery. Motherboard.

Does not run on battery, empty battery indication Battery does not charge

Battery or contacts. Motherboard. Battery or contacts. AC adapter. Motherboard. Fan. Check AC adapter. Check fan.

Display Dark display, no light

White display Erratic display

Adjust display brightness.

Bright or missing pixels or lines Hard disk Hard disk never spins

See quality statement on page 5-2.

LCD module (backlight). LCD cable or connections. Inverter PCA. LCD module. Inverter PCA. LCD cable or connections. LCD module. LCD module. LCD cable or connections. Hard drive or contacts. Motherboard. Hard drive case.

Reseat the I/O PCA. If an external monitor displays no image, replace the I/O PCA instead, then motherboard.

See quality statement on page 5-2.

Check the power source. Remove and reinsert the hard drive. Check the contacts.

If the drive case is damaged, it can prevent proper operation.

3-6

Troubleshooting and Diagnostics

HP OmniBook XE2

Symptom Hard disk makes clunking or scratching noise Hard disk makes buzzing or whining noise

Files are corrupted

Drive capacity is less than normal

Call Center: Suggestions Back up the drive immediately. Was the computer or drive dropped? Back up the drive immediately. Check for alternate noise sources, such as a PCMCIA drive or fan. If a keystroke causes the sound to change, it may be power supply noise. Run a virus scan program. Check the disk surface by running Scandisk (Windows 95/98) or Disk Administrator (Windows NT). Or boot to DOS and run CHKDSK to look for problems, run CHKDSK /f to fix. Use Recovery CD to restore original factory software. Check the disk surface by running Scandisk (Windows 95/98) or Disk Administrator (Windows NT). Check partitions using FDISK (Windows 95/98) or Disk Administrator (Windows NT). Check floppy module contacts. Check settings in BIOS Setup.

Repair Center: Likely Causes Hard drive.

Repair Center: Comments Check the computer and drive for evidence of customer abuse.

Depends on the source of the noise.

Use same suggestions shown at left.

Hard drive.

Use same suggestions shown at left. Recreate the Hibernate partition, then partition and format the disk.

Floppy drive General problems

Floppy module or contacts. Motherboard.

Keyboard Some or all keys do not work properly PS/2 keyboard and mouse with Yadapter do not work Touch pad General problems Check devices separately.

Keyboard. Motherboard. Y-adapter. PS/2 device. Motherboard. Top case. Motherboard.

Try reinserting the flex cable in the connector on the motherboard.

Check settings in Control Panel. Check that the touch pad is enabled in BIOS Setup.

Click button doesn't work

Top case. Motherboard.

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3-7

Symptom Audio Sound does not play

Call Center: Suggestions Check settings in BIOS Setup. Increase sound volume (Fn+UPARROW and software controls). Check whether mute is active (mute button and software controls). Check for sound resource conflicts in Device Manager (Windows 95/98) or Administrative Tools or Control Panel System (Windows NT). Check settings in BIOS Setup. Check software controls for microphone--it should not be muted in recording panel. Note: The microphone should normally be muted in the master output panel. Check settings in BIOS Setup. Check settings in Control Panel (and in Windows NT Diagnostics). Infrared communication is not supported in Windows NT 4.0. Infrared is disabled and no drivers installed as shipped. (Drivers are included.) Check settings in BIOS Setup. Standard IrDA and fast-IrDA are incompatible (they use different drivers). For fast-IrDA, check for DMA conflict with ECP parallel port. USB is not supported in Windows NT 4.0.

Repair Center: Likely Causes Speakers. I/O PCA. Motherboard.

Repair Center: Comments Check operation using headphones or external speakers.

Sound does not record

Inverter PCA (mic). Motherboard. I/O PCA.

Check operation using external microphone.

Serial/Parallel General problems

Motherboard.

Use loop-back connector during test--see page 3-13.

Infrared General problems

I/O PCA. Motherboard.

USB General problems

Motherboard.

3-8

Troubleshooting and Diagnostics

HP OmniBook XE2

Symptom PCMCIA General problems

Call Center: Suggestions Make sure Card Executive is installed for Windows NT. If the card requires an IRQ, check that there is one available. Check for conflicts or refresh the device list in Device Manager (Windows 95) or Administrative Tools or Control Panel System (Windows NT). Reboot the computer. Try the card in the other slot or in another computer. Check the OmniBook website for installation instructions (page vi). Download current drivers from the card manufacturer's website. Try another AC adapter, if available.

Repair Center: Likely Causes Motherboard. PCMCIA socket.

Repair Center: Comments Using a flashlight, look for bent pins inside the PCMCIA socket. If both slots have problems, replace the motherboard. If only one slot has a problem, try replacing the PCMCIA socket.

AC adapter Does not power the OmniBook Miscellaneous Clock loses time

AC adapter. Motherboard.

The AC adapter is not repairable--it must be replaced. Charge backup battery.

Computer gets hot

Plug in AC adapter for 24 hours to charge backup battery. It is normal for the computer to get hot. Make sure the air vents are clear. DOS games and other programs that drive CPU usage toward 100% can contribute.

Motherboard.

Fan. Thermal connections. Heatsink damage.

Check the fan. Check for proper contact between CPU and its top plate, and between heatpipe and heatsink.

HP OmniBook XE2

Troubleshooting and Diagnostics

3-9

Symptom Computer pauses or runs sluggishly

Call Center: Suggestions May be normal Windows behavior (background processing can affect response time). If the hard disk has spun down to conserve power, it can take several seconds to spin up. You can hear this. You can run BIOS Setup and change the hard disk timeout to match the Suspend time-out. Certain background operations (such as HP COE virus scans) can affect performance while they're running. Some file browsers may be unresponsive while they're processing a graphic image or waiting for broken network connections to time out. Check for overheating--see the previous symptom. Run BIOS Setup and tr