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service reference guide
HP Compaq Business Desktop dx2000 uT Series Personal Computers 2st Edition

This document provides information on the removal and replacement of all parts as well as information on troubleshooting, Desktop Management, setup utilities, ATA drives, safety, routine care, connector pin assignments, POST error messages, and diagnostic indicator lights. Document Part Number 359782-002

Service Reference Guide

HP Compaq Business Desktop dx2000 uT Series Personal Computers 2nd Edition
Document Part Number: 359782-002

May 2004

© Copyright 2004 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Microsoft, MS-DOS, Windows, and Windows NT are trademarks of Microsoft Corporation in the U.S. and other countries. Intel is a trademark of Intel Corporation in the U.S. and other countries. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. This document contains proprietary information that is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company.

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WARNING: Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of life. CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information.

Service Reference Guide HP Business Desktop dx2000 uT Series Personal Computers First Edition (March 2004) Second Edition (May 2004) Document Part Number: 359782-002

Contents
1 Installing the Operating System
1.1 Microsoft Windows XP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1.1 Installing or Upgrading Device Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Converting to NTFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.1 Windows XP Home and XP Professional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 HP Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1­1 1­1 1­2 1­2 1­2

2 Setup Utilities and Diagnostics Features
2.1 Power-On Self-Test (POST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 Computer Setup Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.1 Using Computer Setup (F10) Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.2 Computer Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 Protecting the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 Restoring the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2­1 2­2 2­2 2­4 2­8 2­8

3 Desktop Management
3.1 Initial Configuration and Deployment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 ROM Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.1 FailSafe Boot Block ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.2 Dual-State Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.3 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.4 World Wide Web Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.1 Password Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.2 Establishing a Setup Password Using Computer Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.3 Establishing a Power-On Password Using Computer Setup . . . . . . . . . . . . . . . . . . . . . . . 3.3.4 Surge-Tolerant Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3­1 3­1 3­2 3­2 3­3 3­3 3­4 3­4 3­4 3­4 3­7

4 Ultra ATA Drive Guidelines and Features
4.1 Ultra ATA Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 Ultra ATA Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2.1 Cable Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 Drive Installation Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.1 Device Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.2 Attach Sequence Rules by Class Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.3 Attach Sequence Worksheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.4 Additional Drive Application Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 SMART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 Drive Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents

5 Identifying the Chassis, Routine Care, and Disassembly Preparation
5.1 Chassis Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1 Microtower (µT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 Electrostatic Discharge Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.1 Generating Static . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.2 Preventing Electrostatic Damage to Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.3 Personal Grounding Methods and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.4 Grounding the Work Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.5 Recommended Materials and Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3 Routine Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.1 General Cleaning Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.2 Cleaning the Computer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.3 Cleaning the Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.4 Cleaning the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.5 Cleaning the Mouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4 Service Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4.1 Power Supply Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4.2 Tools and Software Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4.3 Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4.4 Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4.5 Hard Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4.6 Lithium Coin Cell Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5­1 5­1 5­2 5­2 5­2 5­3 5­3 5­3 5­4 5­4 5­4 5­5 5­5 5­5 5­6 5­6 5­6 5­6 5­7 5­7 5­7

6 Removal and Replacement Procedures-- Microtower (µT) Chassis
Preparation for Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­1 Access Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­2 Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­3 Front Drive Bezels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­4 6.4.1 5.25" Drive Bezel Blank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­4 6.4.2 Diskette Drive Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­5 6.5 Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­6 6.5.1 Installing Memory Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­6 6.6 Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­8 6.7 Drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­9 6.7.1 Drive Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­9 6.7.2 Removing a 5.25" Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­10 6.7.3 Removing a Diskette Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­11 6.7.4 Removing the Lower Drive Cage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­12 6.7.5 Removing a 3.5" Hard Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­13 6.8 Front USB Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­14 6.9 Power Switch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­15 6.10Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­16 6.11System Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­17 6.12Processor and Heatsink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­18 6.13System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­19 6.14Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­20 6.15Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6­22 6.1 6.2 6.3 6.4

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A Connector Pin Assignments B Power Cord Set Requirements C POST Error Messages D Troubleshooting Without Diagnostics E Memory Index

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Installing the Operating System
Depending on the model, Microsoft Windows XP Home or Windows XP Professional is preinstalled on the computer and will be configured automatically the first time the computer is turned on.

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1.1

CAUTION: Do not add optional hardware devices to your computer until the operating system is successfully installed. Doing so may cause errors and may prevent the operating system from installing properly. CAUTION: Once the automatic installation has begun, DO NOT TURN OFF THE COMPUTER UNTIL THE PROCESS IS COMPLETE. Turning off the computer during the installation process might damage the software that runs the computer.

Microsoft Windows XP
The first time the computer is turned on, Microsoft Windows is automatically installed. This takes approximately 10 minutes, depending on the system hardware configuration. Read and follow the instructions that appear on the screen to complete the installation. During this process, do not turn off your computer unless you are directed to do so.

1.1.1 Installing or Upgrading Device Drivers
To install optional hardware devices after the OS installation is completed, you must install the device drivers for the device you are installing. The I386 directory and its subdirectories provide the HP- or Compaq-specific integration of the operating system for the computer model and include device drivers supported by the operating system. When prompted for the I386 directory on the operating system CD, replace the path specification with C:\I386 or use the Browse button of the dialog box to browse the computer for the I386 folder. This action points to the appropriate drivers. The latest support software is also available from the Web site at http://www.hp.com/support.

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Installing the Operating System

1.2

Converting to NTFS

1.2.1 Windows XP Home and XP Professional
The Windows XP Home and XP Professional operating systems handle only NTFS-formatted drives. When installed, XP will, if necessary, automatically convert a FAT32 drive to NTFS.

1.3

HP Software
The Microsoft Windows XP Home or Windows XP Professional operating system is preinstalled on the computer and will be configured automatically the first time the computer is turned on. All other software is user-installed. Certain drivers and utilities are available only in selected languages. You can obtain the latest version of these files, in English and selected other languages, in one of these ways:


HP web site at www.hp.com Compaq Restore CD, which is supplied with many Compaq models

Additional HP software may be required in certain situations.

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Setup Utilities and Diagnostics Features
Setup Utilities (F10) and diagnostic features provide information needed about the computer system when contacting Customer Support. These tools can also be used to:


Change factory default settings and to set or change the system configuration, which may be necessary when you add or remove hardware. Determine if all of the devices installed on the computer are recognized by the system and functioning properly. Determine information about the operating environment of the computer. Solve system configuration errors detected but not automatically fixed during the Power-On Self-Test (POST). Establish and manage passwords and other security features. Establish and manage energy-saving timeouts.

All features identified in this chapter may not be available on all HP products.
2.1 Power-On Self-Test (POST)
POST is a series of diagnostic tests that runs automatically when the system is turned on. POST checks the following items to ensure that the computer system is functioning properly:


Keyboard Memory modules Diskette drives All IDE and SCSI mass storage devices Processors Controllers

Power-On a key icon appears on is If theneed to enterPassword is set,before continuing. Referthe screen while POST 3.1,running. You "Initial will the password to Chapter 3, Section Configuration and Deployment," for information on setting, deleting, or bypassing the password. If POST finds an error in the system, an audible and/or visual message occurs. For POST error messages and their solutions refer to Appendix C, "POST Error Messages."

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2.2 Computer Setup Utilities
Use Computer Setup Utilities (F10) to:


Modify or restore factory default settings. Set the system date and time. Set, view, change, or verify the system configuration including settings for processor, graphics, memory, audio, storage, communications, and input devices. Modify the boot order of bootable devices such as hard drives, diskette drives, optical drives, or LS-120 drives. Configure the boot priority of IDE (ATA) and SCSI hard drive controllers. The system is preset to always Quick Boot. Enable or disable Network Server Mode, which allows the computer to boot the operating system when the power-on password is enabled with or without a keyboard or mouse attached. When attached to the system, the keyboard and mouse remain locked until the power-on password is entered. Enable power-on password prompting during system restarts (warm boots) as well as during power-on. Establish a setup password that controls access to Computer Setup (F10) Utility and the settings described in this section. Secure the integrated I/O functionality, including the serial, USB, or parallel ports, audio, or embedded NIC, so that they cannot be used until they are unsecured. Enable or disable removable media boot ability. Enable or disable removable media write ability (when supported by hardware). Solve system configuration errors detected but not automatically fixed during the Power-On Self-Test (POST). Execute self-tests on a specified IDE (ATA) hard drive (when supported by the drive).



2.2.1 Using Computer Setup (F10) Utilities
Computer Setup can be accessed only by turning on the computer or restarting the system. To access the Computer Setup Utilities menu, complete the following steps: 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you appropriate time, again, do not press the F10 key at the access the utility. you must turn the computer off, then on and press the F10 key again to If you are using a PS/2 keyboard, you may see a Keyboard Error message--disregard it. 3. Select your language from the list and press the Enter key. 4. A choice of four headings appears in the Computer Setup Utilities menu: File, Storage, Security, and Advanced.

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5. Use the arrow (left and right) keys to select the appropriate heading. Use the arrow (up and down) keys to select the option you want, then press Enter. To return to the Computer Setup Utilities menu, press Esc. 6. To apply and save changes, select File > Save Changes and Exit.


If you have made changes that you do not want applied, select Ignore Changes and Exit. To reset to factory settings, select Set Defaults and Exit. This option will restore the original factory system defaults.

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CAUTION: Do NOT turn the computer power OFF while the ROM is saving your F10 Computer Setup changes because the CMOS could become corrupted. It is safe to turn off all power to the computer after you exit the F10 Setup screen.

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2.2.2 Computer Setup Menu
.
Heading System Information Standard CMOS Setup Option None Description Lists product name, processor type and speed, cache size (L1/ L2), installed memory size, Chipset type, BIOS version, BIOS release date, and CPU ID. Sets the system time (24 hour format). Sets the system date. Calculates the size and capacity of the floppy drive. Auto detects which hard drive is the primary master drive. Auto detects which hard drive is the primary slave drive Auto detects which hard drive is the secondary master drive. Auto detects which hard drive is the secondary slave drive. · Force BIOS: Add-On ROM displayed (default) · Keep Current: Add-On ROM not displayed Sets the amount of time before the Setup Utility prompt (F10=Setup) appears when the computer boots. · None: POST delay time disable (default) · 5: POST delay of 5 seconds · 15: POST delay of 15 seconds · 25: POST delay of 25 seconds · 35: POST delay of 35 seconds System Keyboard Detects if a keyboard is present when the computer boots Absent: keyboard not detected (default) Present: keyboard detected APIC ACPI SCI IRQ Enables or disables the internal I/O APIC and Multiprocessor Tables. (Disabling the APIC ACPI SCI IRQ may require you to reinstall the operating system.) · Enable: IRQ 20-23 (default) · Disable: IRQ 09-11 Hyper-Threading Technology Enables or disables the Intel Hyper-Threading Technology. (This item is only selectable with the Intel HTT CPU plug-in.) · Enable: Intel HTT function enable (BIOS auto detect). · Disable: Intel HTT function disable (BIOS auto detect). Boot Device Priority Specifies the boot order for all devices.

System time (hh/ mm/ss) System date (mm/ dd/yy) Floppy drive A Primary IDE Master Primary IDE Slave Secondary IDE Master Secondary IDE Slave

Advanced CMOS Setup

Add-On ROM Display Mode POST Delay Time (seconds)

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Heading

Option

Description Selects the size of memory for internal graphics adapter. · 1MB: Share 1MB · 4MB: Share 4MB · 8MB: Share 8MB (default) · 16MB: Share 16MB · 32MB: Share 32MB



Support for Computer Setup options may vary depending on your specific hardware configuration.

Advanced CMOS Setup (Continued)

Internal Graphic Mode Select

Power Management Setup

ACPI Standby State

Sets the ACPI standby state when system goes into ACPI standby mode. · S1/PSOS: power on suspend · S3/STR: Suspend to RAM (default)

Restore on AC/ Power Loss

Sets the system status after AC power loss.
· Power Off: System always powers off (Default) · Power On: System always powers on · Last State: System returns to the last state before AC power loss

Resume on Ring

Sets the Resume On Ring from soft off. · Disable: Ring Resume disable (default) · Enable: Ring Resume enable

Resume on PME

Sets the Resume On PME from soft on. · Disable: PME Resume disable · Enable: PME Resume enable (default)

Peripheral Setup

OnBoard LAN

Enables or disables the OnBoard LAN. · Disable: OnBoard LAN disabled · Enable: OnBoard LAN enabled (default)

OnBoard LAN Chip Boot ROM Init. Graphics Adapter Priority

Enables or disables the OnBoard LAN Chip Boot ROM. · Disable: OnBoard LAN Chip Boot ROM disabled · Enable: OnBoard LAN Chip Boot ROM enabled (default) Sets the initial priority of the graphics adapter. · VGA/PCI · PCI/Int-VGA (default) Enables or disables the USB controller. · Disable: USB controller disabled · Enable: USB controller enabled (default)

USB Function



Support for Computer Setup options may vary depending on your specific hardware configuration.

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Heading Peripheral Setup (Continued)

Option USB 1.1 Device Legacy Support

Description Sets the USB 1.1 Device Legacy Support under DOS mode. · Disable: USB 1.1 Device Legacy Support disabled · No Mice: A mouse is not supported · All Devices: All devices are supported (default)

OnBoard Serial Port

Sets the OnBoard Serial Port settings · Auto (default) · Disable · 3F8/IRQ4 · 2F8/IRQ3 · 3E8/IRQ2 · 2E8/IRQ1

OnBoard Parallel Port

Sets the OnBoard Parallel Port settings. · SPP (Bi-Dir) · SPP and EPP-1.9 · ECP · ECP and EPP-1.9 (Default)

Hardware Monitor

CPU Warning Temperature CPU Shutdown Temperature System Warning Temperature System Shutdown Temperature CPU Temperature

Warns when CPU temperature is greater than 85°C/185°F. System will shutdown when CPU temperature is greater than 90°C/194°F. Warns when system temperature is greater than 60°C/140°F. System will shutdown when system temperature is greater than 65°C/149°F. Detects current CPU temperature.



Support for Computer Setup options may vary depending on your specific hardware configuration.

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Heading Hardware Monitor (Continued)

Option System Temperature CPU FAN Speed Chassis FAN Speed CPU VID Vccp +1.5V +2.5V +3.3V +5.0V +12.0V HVcc

Description Detects current system temperature.

Detects CPU fan speed. Detects current chassis fan speed. Detects current CPU voltage. Detects current Vccp voltage. Detects current ATX power +1.5V. Detects current ATX power +2.5V. Detects current ATX power +3.3V. Detects current ATX power +5.0V. Detects current ATX power +12.0V. Detects current HVcc voltage. Allows you to set and change the supervisor password.

Password Option

Change Supervisor Password Password Status Password Check

Shows password status Allows you to set the password check when the supervisor password is set up. · Setup: Password prompt appears when BIOS is executed. · Always: Password verification is checked every time the computer boots (default).

Load Default Settings Save Settings and Exit Exit Without Savings

None None None

Loads the optimal default values for all the setup options. Saves changes and exits setup. Allows you to exit setup without saving any changes.



Support for Computer Setup options may vary depending on your specific hardware configuration.

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2.3 Protecting the Software
To protect software from loss or damage, you should keep a backup copy of all system software, applications, and related files stored on the hard drive. See the operating system or backup utility documentation for instructions on making backup copies of data files.

2.4 Restoring the Software
The Windows operating system and software can be restored to its original state by using the Restore CD. See the Restore CD for complete instructions on using this feature.

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Desktop Management
HP Intelligent Manageability provides standards-based solutions for managing and controlling desktops, workstations, and notebook PCs in a networked environment. The capabilities and features of the seven key components of desktop management are:


Initial configuration and deployment ROM flash Security

Support for specific features described in this guide may vary by model or software version.
3.1 Initial Configuration and Deployment
HP computers come with a preinstalled system software image. After a brief software "unbundling" process, the computer is ready to be used. A customized software image may be deployed by:


Installing additional software applications after unbundling the preinstalled software image. Using software deployment tools, such as Altiris Deployment Solutions, to replace the preinstalled software with a customized software image. Using a disk cloning process to copy the contents from one hard drive to another.

The best deployment method depends on your information technology environment and processes. The PC Deployment section of the Solutions and Services Web site http:// h18000.www1.hp.com/solutions/pcsolutions provides information to help you select the best deployment method. The Restore Plus! CD, ROM-based setup, and ACPI hardware provide further assistance with recovery of system software, configuration management and troubleshooting, and power management.

3.2 ROM Flash
The computer comes with a reprogrammable flash ROM (read only memory). By establishing a setup password in Computer Setup (F10) Utility, you can protect the ROM from being unintentionally updated or overwritten. This is important to ensure the operating integrity of the computer. Should you need or want to upgrade your ROM, you may:


Order an upgraded ROMPaqTM diskette from HP. Download the latest ROMPaq images from http://www.hp.com/support.

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3.2.1 FailSafe Boot Block ROM
The FailSafe Boot Block ROM allows for system recovery in the unlikely event of a ROM flash failure, for example, if a power failure were to occur during a ROM upgrade. The Boot Block is a flash-protected section of the ROM that checks for a valid system ROM flash when power to the system is turned on.


If the system ROM is valid, the system starts normally. If the system ROM fails the validation check, the FailSafe Boot Block ROM provides enough support to start the system from a ROMPaq diskette, which will program the system ROM with a valid image.

To recover the system after it enters Boot Block recovery mode, complete the following steps: 1. If there is a diskette in the diskette drive, remove the diskette and turn off the power. 2. Insert a ROMPaq diskette into the diskette drive. 3. Turn on power to the system. 4. If no ROMPaq diskette is found, you will be prompted to insert one and restart the computer. 5. If the system successfully starts from the diskette and successfully reprograms the ROM, then the three keyboard lights will turn on. 6. Remove the diskette and turn the power off. 7. Turn the power on again to restart the computer.

3.2.2 Dual-State Power Button
With Advanced Configuration and Power Interface (ACPI) enabled for Windows XP, the power button can function either as an on/off switch or as a suspend button. The suspend feature does not completely turn off power, but instead causes the computer to enter a low-power standby. This allows you to quickly power down without closing applications and to quickly return to the same operational state without any data loss. To change the power button's configuration, complete the following steps: 1. Left click on the Start Button, then select Control Panel > Performance and Maintenance > Power Options. 2. In the Power Options Properties, select the Advanced tab. 3. In the Power Button section, select the desired power button setting. After configuring the power button to function as a suspend button, press the power button to put the system in a very low power state (suspend). Press the button again to quickly bring the system out of suspend to full power status. To completely turn off all power to the system, press and hold the power button for four seconds.

Ä

CAUTION: Do not use the power button to turn off the computer unless the system is not responding; turning off the power without operating system interaction could cause damage to or loss of data on the hard drive.

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3.2.3 Power Management
Power Management is a feature that saves energy by shutting down certain components of the computer when they are not in use, saving energy without having to shut down the computer. With Advanced Configuration and Power Interface (ACPI) enabled for Windows 2000 and Windows XP, timeouts (the period of inactivity allowed before shutting down these components) can be enabled, customized, or disabled using the operating system. 1. In Windows 2000, left click on the Start Button, then select Settings > Control Panel > Power Options. In Windows XP, left click on the Start Button, then select Control Panel > Power Options. 2. In the Power Options Properties, select the Power Schemes tab. 3. Select the desired power scheme settings. Use Display Properties to establish, modify, or disable Power Management settings for the monitor. To access Display Properties, right click on the Windows Desktop, then choose Properties.

3.2.4 World Wide Web Site
When making the transition to new or revised operating systems, it is important to implement the support software designed for that operating system. If you plan to run a version of Microsoft Windows that is different from the version included with your computer, you must install corresponding device drivers and utilities to ensure that all features are supported and functioning properly. HP has made the task of locating, accessing, evaluating, and installing the latest support software easier. You can download the software from http://www.hp.com/support. The Web site contains the latest device drivers, utilities, and flashable ROM images needed to run the latest Microsoft Windows operating system on your HP computer.

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3.3

Security

3.3.1 Password Security
The power-on password prevents unauthorized use of the computer by requiring entry of a password to access applications or data each time the computer is turned on or restarted. The setup password specifically prevents unauthorized access to Computer Setup, and can also be used as an override to the power-on password. That is, when prompted for the power-on password, entering the setup password instead will allow access to the computer. A network-wide setup password can be established to enable the system administrator to log in to all network systems to perform maintenance without having to know the power-on password, even if one has been established.

3.3.2 Establishing a Setup Password Using Computer Setup
Establishing a setup password through Computer Setup prevents reconfiguration of the computer (use of the Computer Setup (F10) utility) until the password is entered. 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you appropriate time, again, do not press the F10 key at the access the utility. you must turn the computer off, then on and press the F10 key again to If you are using a PS/2 keyboard, you may see a Keyboard Error message--disregard it. 3. Select Security, then select Setup Password and follow the instructions on the screen. 4. Before exiting, click File > Save Changes and Exit.

3.3.3 Establishing a Power-On Password Using Computer Setup
Establishing a power-on password through Computer Setup prevents access to the computer when power is turned on, unless the password is entered. When a power-on password is set, Computer Setup presents Password Options under the Security menu. Password options include Password Prompt on Warm Boot. When Password Prompt on Warm Boot is enabled, the password must also be entered each time the computer is rebooted. 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you appropriate time, again, do not press the F10 key at the access the utility. you must turn the computer off, then on and press the F10 key again to If you are using a PS/2 keyboard, you may see a Keyboard Error message--disregard it. 3. Select Security, then Power-On Password and follow the instructions on the screen. 4. Before exiting, click File > Save Changes and Exit.

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Entering a Power-On Password
To enter a power-on password, complete the following steps: 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. When the key icon appears on the monitor, type your current password, then press Enter.

Type carefully; for security reasons, the characters you type do not appear on the screen.
If you enter the password incorrectly, a broken key icon appears. Try again. After three unsuccessful tries, you must turn off the computer, then turn it on again before you can continue.

Entering a Setup Password
If a setup password has been established on the computer, you will be prompted to enter it each time you run Computer Setup. 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you appropriate time, again, do not press the F10 key at the access the utility. you must turn the computer off, then on and press the F10 key again to If you are using a PS/2 keyboard, you may see a Keyboard Error message--disregard it. 3. When the key icon appears on the monitor, type the setup password, then press the Enter key.

Type carefully; for security reasons, the characters you type do not appear on the screen.
If you enter the password incorrectly, a broken key icon appears. Try again. After three unsuccessful tries, you must turn off the computer, then turn it on again before you can continue.

Changing a Power-On or Setup Password
1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. To change the setup password, run Computer Setup. 2. To change the Power-On password, go to step 3. To change the Setup password, as soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you appropriate time, again, do not press the F10 key at the access the utility. you must turn the computer off, then on and press the F10 key again to If you are using a PS/2 keyboard, you may see a Keyboard Error message--disregard it.

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3. When the key icon appears, type your current password, a slash (/) or alternate delimiter character, your new password, another slash (/) or alternate delimiter character, and your new password again as shown:
current password/new password/new password

Type carefully; for security reasons, the characters you type do not appear on the screen.
4. Press the Enter key. The new password takes effect the next time you turn on the computer. Refer about to the "National Keyboard Delimiter Characters" section in this chapter for information the alternate delimiter characters. The power-on password and setup password may also be changed using the Security options in Computer Setup.

Deleting a Power-On or Setup Password
1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. To delete the setup password, run Computer Setup. 2. To delete the Power-On password, go to step 3. To delete the Setup password, as soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you appropriate time, again, do not press the F10 key at the access the utility. you must turn the computer off, then on and press the F10 key again to If you are using a PS/2 keyboard, you may see a Keyboard Error message--disregard it. 3. When the key icon appears, type your current password followed by a slash (/) or alternate delimiter character as shown:
current password/

4. Press the Enter key. alternate Refer to "National Keyboard Delimiter Characters" for information about the using the delimiter characters. The power-on password and setup password may also be changed Security options in Computer Setup.

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National Keyboard Delimiter Characters
Each keyboard is designed to meet country-specific requirements. The syntax and keys that you use for changing or deleting your password depend on the keyboard that came with your computer. National Keyboard Delimiter Characters
Arabic Belgian BHCSY* Brazilian Chinese Czech Danish French French Canadian German / = / / ! é Greek Hebrew Hungarian Italian Japanese Korean Latin American Norwegian Polish Portuguese . / / Russian Slovakian Spanish Swedish/Finnish Swiss Taiwanese Thai Turkish U.K. English U.S. English / / / / . / /

* For Bosnia-Herzegovina, Croatia, Slovenia, and Yugoslavia

Clearing Passwords
If you forget your password, you cannot access the computer. To clear the password, turn off and unplug the computer then, press the CMOS reset button, holding it down for 5 seconds. Close and restart the computer.

3.3.4 Surge-Tolerant Power Supply
An integrated surge-tolerant power supply provides greater reliability when the computer is hit with an unpredictable power surge. This power supply is rated to withstand a power surge of up to 2000 volts without incurring any system downtime or data loss.

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Ultra ATA Drive Guidelines and Features
4.1 Ultra ATA Jumpers
Ultra ATA drives are configured by means of jumper settings. Factory-installed drives ship with the jumpers preset to the cable-select mode; therefore, no jumper setting changes are required on factory pre installed, replacement, or option drives. With cable-select, the drive is configured as either Master (Drive/Device 0) or Slave (Drive/Device 1) by its physical attachment to the cable. If you purchase a third-party hard drive, refer to the documentation included with the drive kit to ensure proper cable installation and configuration. on a controller channel need to either the cable-select mode or All drivesindividual drive jumper installed have their jumpers Masterin(Drive/Device 0) or Slave have the on the appropriate (Drive/Device 1) position.

4.2 Ultra ATA Cables
When installing a second device on either the primary or secondary controller, you must use an industry standard 40-pin, 80-conductor Ultra ATA cable for optimal performance. These cables have a maximum length of 18 inches and a maximum distance of 6 inches between the two devices for a two-drive cable. Drives operating at speeds faster than those of the Ultra ATA-33 devices require industrystandard 40-pin, 80-conductor cables to maintain the higher data transfer rates possible with the improved technology. When using Ultra ATA-133, -100, -66, and slower -33 drives in the same system, each drive will operate at its appropriate data transfer rate.

4.2.1 Cable Layout
The faces of industry-standard cable connectors are color coded for easy recognition:


System board connector = blue face Device 0 connector = black face Device 1 connector = gray face

The color code of an industry-standard cable is valid only if the drive's jumper is in the cableselect position.

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Single-Drive Cable
System Board Blue Face Device 0 (master) Black Face

Two-Drive Cable
System Board Blue Face Device 1 (slave) Gray Face Device 0 (master) Black Face

On a two-drive cable, the Drive/Device 0 connector is always the farthest one from the system board connector and the Drive/Device 1 connector is always the closest to the system board connector.

Some cables may be labeled "Drive 0" instead of "Device 0" and "Drive 1" instead of "Device 1".
4.3 Drive Installation Guidelines
Most computer system boards have two ATA (IDE) controller channels with a dedicated connector for each controller. One controller is designated as the primary and the other as the secondary controller. Each of the two controllers can have up to two devices attached to it. Each computer system may therefore have a maximum of four ATA/ATAPI drives. All drives are connected to these controllers using an industry-standard 40-pin, 80-conductor cable. standard The industrymaximum1.44 MB diskette drive has its own separate channel and is not included as a part of the four drives. Any drive attached to a controller must have a drive designation. If only a single drive is connected to a controller and its jumper is in the cable-select position, it is designated as the Master Drive (Drive/Device 0) by its attachment to the Drive/Device 0 cable position. If two cable-selected drives are connected to a single controller, one will be designated by its attachment to the cable as the Master (Drive/Device 0) and the other as Slave (Drive/Device 1). For optimal performance of a computer system, all drives need to be attached to the ATA controllers in a specified sequence. This sequence is determined by the device class of the drives and by specific attach sequence rules.

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4.3.1 Device Classes
In order to determine the best drive attach sequence, ATA/ATAPI drives are segregated into four different classes based upon the bandwidth demands they place on an ATA controller. The most demanding devices are in Class 1 and the least demanding are in Class 4.
Class 1 Hard Drives ATA-100 ATA-66 ATA-33 Class 2 High Speed Optical Drives DVD DVD-CD R/W Class 3 Optical Storage Drives R/W CD-ROM CD-ROM Class 4 Magnetic Storage Drives LS-120 Tape Zip

General Attach Guidelines


The lower the device class number, the faster the device and the more bandwidth required. Drives installed in the Device 0 positions on both the primary and secondary controllers receive the greatest possible bandwidth. The bootable ATA hard drive should always be installed on the primary controller in the Device 0 position.

4.3.2 Attach Sequence Rules by Class Priority
Drives should be attached in the sequence shown for optimum performance starting at position 1. 4 1

3 Primary Controller* Secondary Controller

2 4 1

3

2

Device 1

Device 0

*If there are three or more devices, two or more of which are hard drives, two hard drives should be attached to the primary controller first before following the General Attach Sequence Rule.

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The attach sequence rule may also be stated in table format: General Attach Sequence Rule*
Sequence 1 2 3 4 Description The lowest class drive - bootable hard drive recommended. If only two drives, the last drive goes here; otherwise the lowest class of the remaining drives. If only three drives, attach the final drive here. If a fourth drive exists, attach the lowest class drive here. If there is a fourth drive, attach the final drive here - the drive with the highest class number of all devices.

*If there are three or more devices, two or more of which are hard drives, two hard drives should be attached to the primary controller first before following the General Attach Sequence Rule.

The rules allow for:


Keeping the hard drive on a separate controller channel maximizes drive performance until a fourth device is added. Keeping the hard drives and removable media drives on separate controller channels maximizes compatibility. Keeping the hard drive and the writable optical drive on separate controller channels maximizes optical drive reliability.

4.3.3 Attach Sequence Worksheet
Use the worksheet below for obtaining optimum system performance when setting up a computer with multiple drives. Use the General Attach Sequence Rule to determine the best drive installation sequence. Attach Sequence Worksheet
Device Name Device Class Position Number Controller Name Device Number

Two examples of how to use the worksheet are:


Three device installation Four device installation

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Example 1: Three Device Installation Sample
A system has three devices: Ultra ATA-100 hard drive, CD-ROM drive, and a DVD drive. Using the Device Class Table in Section 4.3.1, the devices may be identified as:


Ultra ATA-100 hard drive = Class 1 DVD drive = Class 2 CD-ROM drive = Class 3 Attach Sequence Worksheet - Three Device Installation (Sample)
Device Name Device Class 1 2 3 Position Number 1 2 3 Controller Name Primary Secondary Secondary Device Number 0 0 1

Ultra ATA-100 hard drive DVD drive CD-ROM drive

4

1

3 Primary Controller* Secondary Controller

2 4 1

3

2

Device 1

Device 0

Example 2: Four Device Installation Sample
A system has four devices: Ultra ATA-100 hard drive, Ultra ATA-100 hard drive, DVD-CDR/W drive, and a ZIP-250 drive. Using the Device Class Table in Section 4.3.1, the devices may be reidentified as:


Ultra ATA-100 hard drive = Class 1 Ultra ATA-100 hard drive = Class 1 DVD-CDR/W drive = Class 2 ZIP-250 drive = Class 4

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Attach Sequence Worksheet - Four Device Installation (Sample)
Device Name Ultra ATA-100 hard drive DVD-CDR/W drive ZIP-250 drive Ultra ATA-100 hard drive* Device Class 1 2 4 1 Position Number 1 2 3 4 Controller Name Primary Secondary Secondary Primary Device Number 0 0 1 1

*If there are three or more devices, two or more of which are hard drives, two hard drives should be attached to the primary controller first before following the General Attach Sequence Rule. 4 1

3 Primary Controller* Secondary Controller

2 4 1

3

2

Device 1

Device 0

4.3.4 Additional Drive Application Notes


When replacing a hard drive, the replacement should be of the same type (Ultra ATA -33, 66, or -100) as that being removed to retain the same level of performance. When Ultra ATA and SCSI hard drives are mixed in the same system, the Ultra ATA drive will become the boot drive unless the boot order is changed in Computer Setup (F10 Setup).

4.4 SMART
The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard drive. The SMART drive tracks fault prediction and failure indication parameters such as reallocated sector count, spin retry count, and calibration retry count. If the drive determines that a failure is imminent, it generates a fault alert.

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4.5 Drive Capacities
The combination of the file system and the operating system used in the computer determines the maximum usable size of a drive partition. A drive partition is the largest segment of a drive that may be properly accessed by the operating system. A single hard drive may therefore be subdivided into a number of unique drive partitions in order to make use of all of its space. The table that follows identifies the capabilities and restrictions imposed on the computer by the combinations of file and operating systems. Microsoft to Drive Manufacturer Size Conversion Table*
Drive Size as Identified by Microsoft Operating System 2 GB 4 GB 32 GB 64 GB 128 GB 2 TB Drive Size as Identified by Drive Manufacturers 2.1 GB 4.3 GB 34.4 GB 68.7 GB 137 GB 2.199 TB

*Drive size calculations by drive manufacturers are bytes to the base 10 while calculations by Microsoft are bytes to the base 2.

Drive/Partition Capacity Limits Maximum Size File System FAT 32 FAT 32 NTFS NTFS Controller Type ATA SCSI ATA SCSI Operating System Windows 2000/ XP Windows 2000/ XP Windows NT/2000/XP Windows NT/2000/XP Partition 32 GB 32 GB 128 TB 2TB Drive 128 PB 2 TB 128 PB 2TB

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Identifying the Chassis, Routine Care, and Disassembly Preparation
This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service.

Ä
5.1

CAUTION: When the computer is plugged into an AC power source voltage is always applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

Chassis Designations

5.1.1 Microtower (µT)

This chassis may have either a carbonite or silver front bezel depending on the geographical location.

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5.2

Electrostatic Discharge Information
A sudden discharge of static electricity from your finger or other conductor can destroy staticsensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, but it has been degraded in the internal layers, reducing its life expectancy. Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

5.2.1 Generating Static
The following table shows that:


Different activities generate different amounts of static electricity. Static electricity increases as humidity decreases.
Relative Humidity Event Walking across carpet Walking across vinyl floor Motions of bench worker Removing bubble pack from PCB Packing PCBs in foam-lined box 55% 7,500 V 3,000 V 400 V 7,000 V 5,000 V 40% 15,000 V 5,000 V 800 V 20,000 V 11,000 V 10% 35,000 V 12,000 V 6,000 V 26,500 V 21,000 V

700 volts can degrade a product.
5.2.2 Preventing Electrostatic Damage to Equipment
Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric components and accessories.


To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes. Protect all electrostatic parts and assemblies with conductive or approved containers or packaging. Keep electrostatic sensitive parts in their containers until they arrive at static-free stations. Place items on a grounded surface before removing them from their container. Always be properly grounded when touching a sensitive component or assembly. Avoid contact with pins, leads, or circuitry. Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive foam.

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5.2.3 Personal Grounding Methods and Equipment
Use the following equipment to prevent static electricity damage to equipment:


Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be connected and fit snugly into the banana plug connector on the grounding mat or workstation. Heel straps/Toe straps/Boot straps can be used at standing workstations and are compatible with most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with a maximum of one-megohm ± 10% resistance between the operator and ground.
Static Shielding Protection Levels Method Voltage 1,500 7,500 15,000



Antistatic plastic Carbon-loaded plastic Metallized laminate

5.2.4 Grounding the Work Area
To prevent static damage at the work area, use the following precautions:


Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to the work surface and properly grounded tools and equipment. Use static-dissipative mats, foot straps, or air ionizers to give added protection. Handle electrostatic sensitive components, parts, and assemblies by the case or PCB laminate. Handle them only at static-free work areas. Turn off power and input signals before inserting and removing connectors or test equipment. Use fixtures made of static-safe materials when fixtures must directly contact dissipative surfaces. Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam. Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive.

5.2.5 Recommended Materials and Equipment
Materials and equipment that are recommended for use in preventing static electricity include:


Antistatic tape Antistatic smocks, aprons, or sleeve protectors Conductive bins and other assembly or soldering aids Conductive foam Conductive tabletop workstations with ground cord of one-megohm +/- 10% resistance Static-dissipative table or floor mats with hard tie to ground Field service kits
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Static awareness labels Wrist straps and footwear straps providing one-megohm +/- 10% resistance Material handling packages Conductive plastic bags Conductive plastic tubes Conductive tote boxes Opaque shielding bags Transparent metallized shielding bags Transparent shielding tubes

5.3

Routine Care

5.3.1 General Cleaning Safety Precautions
1. Never use solvents or flammable solutions to clean the computer. 2. Never immerse any parts in water or cleaning solutions; apply any liquids to a clean cloth and then use the cloth on the component. 3. Always unplug the computer when cleaning with liquids or damp cloths. 4. Always unplug the computer before cleaning the keyboard, mouse, or air vents. 5. Disconnect the keyboard before cleaning it. 6. Wear safety glasses equipped with side shields when cleaning the keyboard.

5.3.2 Cleaning the Computer Case
Follow all safety precautions in Section 5.3.1, "General Cleaning Safety Precautions," before cleaning the computer. To clean the computer case, follow the procedures described below:


To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab. For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well by wiping it with a cloth or swab dampened with clear water. For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the alcohol will evaporate quickly and not leave a residue. After cleaning, always wipe the unit with a clean, lint-free cloth. Occasionally clean the air vents on the computer. Lint and other foreign matter can block the vents and limit the airflow.

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5.3.3 Cleaning the Keyboard
Follow all safety precautions in Section 5.3.1, "General Cleaning Safety Precautions," before cleaning the keyboard. To clean the tops of the keys or the keyboard body, follow the procedures described in Section 5.3.2, "Cleaning the Computer Case." When cleaning debris from under the keys, review all rules in Section 5.3.1, "General Cleaning Safety Precautions," before following these procedures:

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CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the keys.



Visible debris underneath or between the keys may be removed by vacuuming or shaking. Canned, pressurized air may be used to clean debris from under the keys. Caution should be used as too much air pressure can dislodge lubricants applied under the wide keys. If you remove a key, use a specially designed key puller to prevent damage to the keys. This tool is available through many electronic supply outlets.

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CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are improperly removed or installed, the keyboard may not function properly.



Cleaning under a key may be done with a swab moistened with isopropyl alcohol and squeezed out. Be careful not to wipe away lubricants necessary for proper key functions. Use tweezers to remove any fibers or dirt in confined areas. Allow the parts to air dry before reassembly.

5.3.4 Cleaning the Monitor


Wipe the monitor screen with a clean cloth moistened with water or with a towelette designed for cleaning monitors. Do not use sprays or aerosols directly on the screen; the liquid may seep into the housing and damage a component. Never use solvents or flammable liquids on the monitor. To clean the monitor body follow the procedures in Section 5.3.2, "Cleaning the Computer Case."



5.3.5 Cleaning the Mouse
Before cleaning the mouse, ensure that the power to the computer is turned off.


Clean the mouse ball by first removing the retaining plate and the ball from the housing. Pull out any debris from the ball socket and wipe the ball with a clean, dry cloth before reassembly. To clean the mouse body, follow the procedures in Section 5.3.2, "Cleaning the Computer Case."



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5.4

Service Considerations
Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

5.4.1 Power Supply Fan
The power supply fan is a variable-speed fan based on the temperature in the power supply.

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CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been disconnected. The cooling fan is always on when the computer is either in the "On," "Standby," or "Suspend" modes. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

5.4.2 Tools and Software Requirements
To service the computer, you need the following:


Torx T-15 screwdriver (Compaq screwdriver with bits, PN 161946-001) Torx T-15 screwdriver with small diameter shank (for certain front bezel removal) Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver) Diagnostics software Compaq tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or Compaq tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002)

5.4.3 Screws
The screws used in the computer are not interchangeable. They may have standard or metric threads and may be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations. a black finish. Metric screws havesilver finish. U.S. screws have a subassembly is As eachprevent damage. removed from the computer, it should be placed away from the work area to

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5.4.4 Cables and Connectors
Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

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CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can damage the computer.

5.4.5 Hard Drives
Handle hard drives as delicate, precision components, avoiding all physical shock and vibration. This applies to failed drives as well as replacement spares.


If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective packaging and label the package "Fragile: Handle With Care." Do not remove hard drives from the shipping package for storage. Keep hard drives in their protective packaging until they are actually mounted in the CPU. Avoid dropping drives from any height onto any surface. If you are inserting or removing a hard drive, turn off the computer. Do not remove a hard drive while the computer is on or in standby mode. Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid touching the connector. For more information about preventing electrostatic damage, refer to Section 5.2, "Electrostatic Discharge Information." Do not use excessive force when inserting a drive. Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields such as monitors or speakers.



5.4.6 Lithium Coin Cell