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Service Manual

HP OmniBook 300, 425, 430, 530

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. Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. HewlettPackard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. Hewlett-Packard assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Hewlett-Packard. As an ENERGY STAR partner, HP has determined that these products meet the ENERGY STAR guidelines for energy efficiency. All Certifications may not be completed at product introduction. Please 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. ENERGY STAR is a service mark of the U.S. Environmental Protection Agency. IBM and OS/2 are registered trademarks of International Business Machines Corporation. Pentium and the Intel Inside logo are registered trademarks of Intel Corporation. LapLink Remote Access is a trademark of Traveling Software, Inc. Microsoft, MS-DOS, and Windows are registered trademarks, and the Genuine Microsoft Products logo is a trademark of Microsoft Corporation in the United States of America and in other countries. © Hewlett-Packard Company 1996. All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited except as allowed under copyright laws. Printed in U.S.A. 5965-0244

Table of Contents
Table of Figures .........................................................................................................................iv Introduction .................................................................................................................................v Product Overview........................................................................................................................1 Product Features .....................................................................................................................2 OmniBook 300, 425, and 430 ...............................................................................................2 OmniBook 530 .....................................................................................................................3 Product Comparisons...............................................................................................................4 Product at a Glance .................................................................................................................6 Troubleshooting...........................................................................................................................9 OmniBook Self-Test...............................................................................................................10 Loop Back Connectors........................................................................................................10 Troubleshooting Flowchart .....................................................................................................12 Main Troubleshooting Flowchart .........................................................................................13 Power Source Problems .....................................................................................................15 Boot-Up Problems ..............................................................................................................18 Display Problems ...............................................................................................................19 Hard Disk Problems............................................................................................................20 Memory Problems ..............................................................................................................23 Power Management Problems............................................................................................25 Pop-Out Mouse Problems...................................................................................................28 Floppy Drive Problems .......................................................................................................32 Parallel Port Problems........................................................................................................35 Serial Port Problems ..........................................................................................................37 PCMCIA Problems .............................................................................................................39 IR Port Problems ................................................................................................................43 Hardware Repair .......................................................................................................................45 Battery (End User Replaceable).............................................................................................46 Memory (End User Replaceable) ...........................................................................................48 Hard Disk Drive/Flash Card and System ROM (End User Replaceable).................................50 Mouse (End User Replaceable)..............................................................................................52 Small Parts (End User Replaceable) ......................................................................................53 Battery Door .......................................................................................................................53 Battery Door Latch..............................................................................................................53 Blank Modem Door.............................................................................................................53 Memory Door .....................................................................................................................53 I/O Door .............................................................................................................................53 Rubber Feet .......................................................................................................................53 PCMCIA Card Tray.............................................................................................................53 Display (HP Authorized Service Providers Only)....................................................................54 Keyboard (HP Authorized Service Providers Only) ................................................................62 Logic PCA Board (HP Authorized Service Providers Only).....................................................63 Paw Carrier (Paw Active) (HP Authorized Service Providers Only) ........................................65 Other Components (HP Authorized Service Providers Only)..................................................66 Appendix A - Technical and Resource Specifications ................................................................67 Mass Storage Specifications ..................................................................................................67 Card Services and Socket Services Version Matrix................................................................67 Memory Map..........................................................................................................................68 Upper Memory Block Space...................................................................................................68 DOS Conventional Memory ...................................................................................................68 Appendix B - Power On Self Test Codes ...................................................................................69 Beep Codes ...........................................................................................................................69 Display Codes........................................................................................................................70 Appendix C - Password Policy...................................................................................................75

ii

Appendix D - Part Numbers.......................................................................................................77

iii

Table of Figures
Figure 1 - OmniBook 300, 425, and 430 Features .......................................................................2 Figure 2 - OmniBook 530 Features..............................................................................................3 Figure 3 - Serial Loop Back Connector ......................................................................................11 Figure 4 - Parallel Loop Back Connector ...................................................................................11 Figure 5 - OmniBook Memory Modules .....................................................................................48 Figure 6 - Removing the Memory Module..................................................................................49 Figure 7 - Removing Card Slot Tray ..........................................................................................51 Figure 8 - Removing the Mouse ................................................................................................52 Figure 9 - Outer Bottom Case Components ...............................................................................54 Figure 10 - Backplane Standoffs................................................................................................55 Figure 11 - Bottom Case Tabs...................................................................................................55 Figure 12 - Bottom Case Prying Locations.................................................................................56 Figure 13 - I/O Port Prying Location ..........................................................................................56 Figure 14 - Disconnecting Display Cable ...................................................................................57 Figure 15 - Keyboard Flex Cables .............................................................................................58 Figure 16 - Display Grounding Eyelets.......................................................................................58 Figure 17 - Display Cable Probe Position ..................................................................................60 Figure 18 - Reconnecting Display Cable....................................................................................60 Figure 19 - I/O Port Eyelets (all present)....................................................................................61 Figure 20 - I/O Port Eyelets (two matched sets).........................................................................61 Figure 21 - I/O Port Eyelets (only one matched set)...................................................................61 Figure 22 - I/O Port Eyelets (no eyelet in position one) ..............................................................61 Figure 23 - Logic Board PCA Removal......................................................................................63 Figure 24 - Paw Carrier Removal ..............................................................................................65

iv

Introduction
This document provides reference information for the HP OmniBook 300, HP OmniBook 425, HP OmniBook 430, and HP OmniBook 530. It is intended to be used by HP-qualified service personnel to help with the installation, servicing, and repair of these HP OmniBook PCs. It is a self-paced guide designed to train you to install, configure, and repair the OmniBook Notebook PC. You can follow it without having any equipment available. The following table lists additional sources where supplementary information can be obtained: Resource HP External Web HP-MCD Internal Web HP MCD Service Engineer Number/Address http://hpcc998.external.hp.com/mcd/ http://webmcd.cv.hp.com [email protected] Comments No usage restriction Restricted to HP internet access only Email address for service related questions and issues

v

Part 1

Product Overview
· Product Features · Product Comparisons · Product at a Glance

Product Features
OmniBook 300, 425, and 430

Figure 1 - OmniBook 300, 425, and 430 Features

1. 2. 3. 4. 5. 6. 7. 8. 9. 10.

Latch Display Keyboard Card slot A Card-eject levers On/Off key Mouse Mouse-eject button Display contrast buttons Speaker

11. 12. 13. 14. 15. 16. 17. 18. 19. 20.

AC adapter socket Serial port connector Parallel port connector Infrared port System slots (C and D) Memory-expansion slot Modem port Battery compartment Security ring Reset button

2

OmniBook 530

Figure 2 - OmniBook 530 Features

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.

Latch Display Keyboard Card slots Card-eject levers On/Off key Mouse Mouse-eject button Display contrast buttons Speaker AC adapter socket

12. 13. 14. 15. 16. 17. 18. 19. 20. 21.

Serial port connector Parallel port connector VGA output connector System slots Memory-expansion slot Modem port Battery compartment Security ring Infrared port Reset button

3

Product Comparisons
OmniBook 300
Size Closed Weight Processor Clock Speed Display VGA-out Support Battery
16.3 x 28.2 x 3.6 cm (6.4 x 11.1 x 1.4 in) 1.31 kg (2.888 lb) w/flash 1.36 kg (2.998) w/hdd 386SXLV 20 MHz 640 x 480 VGA 9-inch diagonal LCD 16 shades of gray none

OmniBook 425
16.3 x 28.2 x 3.6 cm (6.4 x 11.1 x 1.4 in) 1.31 kg (2.888 lb) w/flash 1.36 kg (2.998) w/hdd 486SLC/e 25 MHz 640 x 480 VGA 9-inch diagonal LCD 16 shades of gray none

OmniBook 430
16.3 x 28.2 x 3.6 cm (6.4 x 11.1 x 1.4 in) 1.36 kg (2.998 lb)

OmniBook 530
16.3 x 28.2 x 3.6 cm (6.4 x 11.1 x 1.4 in) 1.36 kg (2.998 lb)
©

486SLC/e 25 MHz 640 x 480 VGA 9-inch diagonal LCD none

Intel 486SX 33 MHz 640 x 480 VGA 9-inch diagonal LCD 640 x 480, 16 or 256 colors 800 x 600, 16 colors 4.8 Vdc nickel-metalhydride rechargeable

Battery Life AC Adapter Recharge Time Operating Temperature Storage Temperature (with data retention) Operating and Storage Humidity Mass Storage Available Memory

4.8 Vdc nickel-metalhydride rechargeable 1.5 V alkaline AA (flash version only) 5 hours w/hdd 9 hours w/flash 100 to 240 Vac (50 to 60 Hz) input 12 Vdc output less than 1.5 hours w/ac adapter 0 to 40 C (32 to 104 F) 0 to 55 C (32 to 131 F)

4.8 Vdc nickel-metalhydride rechargeable 1.5 V alkaline AA (flash version only) 4.5 hours w/hdd 8 hours w/flash 100 to 240 Vac (50 to 60 Hz) input 12 Vdc output less than 1.5 hours w/ac adapter 0 to 40 C (32 to 104 F) 0 to 55 C (32 to 131 F)

4.8 Vdc nickel-metalhydride rechargeable 1.5 V lithium AA 4.5 hours 100 to 240 Vac (50 to 60 Hz) input 12 Vdc output less than 1.5 hours w/ac adapter 0 to 40 C (32 to 104 F) 0 to 55 C (32 to 131 F)

4 hours 100 to 240 Vac (50 to 60 Hz) input 12 Vdc output less than 1.5 hours w/ac adapter 0 to 40 C (32 to 104 F) 0 to 55 C (32 to 131 F)

90% relative humidity at 40 C (104 F) maximum

90% relative humidity at 40 C (104 F) maximum

90% relative humidity at 40 C (104 F) maximum

90% relative humidity at 40 C (104 F) maximum

40-MB hard disk 10-MB flash disk 2 MB RAM

40-MB hard disk 10-MB flash disk 2 MB RAM

Memory Expansion Available Input/Output

2-MB, 4-MB

2-MB, 4-MB

105-MB hard disk 40-MB hard disk 2 MB RAM on 40MB version 4 MB RAM on 105MB version 2-MB, 4-MB

130-MB hard disk 4 MB RAM

4-MB, 8-MB

9-pin, 115K baud, RS-232 port 25-pin parallel port 115K baud, bidirectional infrared port Communication port for optional fax/modem
85 keys Industry-standard, fullsized key spacing Embedded numeric keypad 9 Fn keys Built-in pop-up mouse PCMCIA, Type II, Version 2.0 card slots Two slots available with

9-pin, 115K baud, RS-232 port 25-pin parallel port 115K baud, bidirectional infrared port Communication port for optional fax/modem
85 keys Industry-standard, fullsized key spacing Embedded numeric keypad 12 Fn keys Built-in pop-up mouse PCMCIA, Type II, Version 2.0 card slots Two slots available with

9-pin, 115K baud, RS-232 port 25-pin parallel port 115K baud, bidirectional infrared port Communication port for optional fax/modem
85 keys Industry-standard, fullsized key spacing Embedded numeric keypad 12 Fn keys Built-in pop-up mouse PCMCIA, Type II, Version 2.0 card slots One slot available with

9-pin, 115K baud, RS-232 port 25-pin parallel port 115K baud, bidirectional infrared port Communication port for optional fax/modem
85 keys Industry-standard, fullsized key spacing Embedded numeric keypad 12 Fn keys Built-in pop-up mouse Two PCMCIA Type II slots (one Type III slot) Optional floppy disk

Keyboard and Mouse

Expandability

4

OmniBook 300
the flash disk version One slot available with the hard disk version © MS Windows 3.1* © MS DOS 5.0* MS Word 2.0* MS Excel 4.0* LapLink Remote TM Access Phone Book Appointment Book HP Financial Calculator

OmniBook 425
the flash disk version One slot available with the hard disk version © MS Windows 3.1* © MS DOS 5.0* MS Word 2.0* MS Excel 4.0* LapLink Remote TM Access Phone Book Appointment Book HP Financial Calculator

OmniBook 430
the hard disk version
©

OmniBook 530
drive
©

Pre-installed Software

MS Windows 3.1 © MS DOS 6.2 LapLink Remote TM Access Phone Book Appointment Book HP Financial Calculator

MS Windows 3.11 © MS DOS 6.2 LapLink Remote TM Access Phone Book Appointment Book HP Financial Calculator

*(Note: All components not included can be installed from a retail copy. License for full Microsoft Word, Microsoft Excel, MSDOS, and Microsoft Windows is included with purchase.)

5

Product at a Glance

14

28

14 29 27

17 35 33 5 10 6 2 2 2 2 13 2 2 2 13 24 18 1 1 1 1 7 15 9 32 11 13 16 16

12 2 30

2 2 13 19 6 8 10 2 5

26

2 23 4 3

20 21

31

22 25

34

6

Description Part Number OB300 OB425 OB430 OB530 Standoff 0380-4060 Screw M2x4.6mm (T6) 0515-2396 Mouse 5061-4390 Arm Eject Mouse Spring F1030-00016 Pivot Door Spring F1030-00026 Spring Card Eject F1030-00029 Mouse Latch Spring F1030-00030 Mylar Mouse Shield F1030-20001 Door Battery Door Battery (10 pack) F1030-60912 Door Battery (silver) F1052-40012 10 Pivot Door Pivot Door (PCMCIA) A F1030-40013 Pivot Door (PCMCIA) B F1030-40014 Pivot Door (PCMCIA) Left F1052-40007 11 Door Modem Blank F1030-40016 12 Door RAM F1030-40017 13 Rubber Foot F1030-40018 14 Hinge Cap F1030-40019 15 Mouse Button Latch F1030-40021 16 Battery Door Latch F1030-40025 17 Security Latch F1030-40033 18 Eject Button A F1030-40044 19 Eject Button B F1030-40045 20 Eject Arm Left F1030-40046 21 Eject Arm Right F1030-40047 22 Paw Carrier Srvc Assy F1030-60901 23 Arm Eject Mouse F1030-40050 24 Door I/O F1030-60908 25 Pivot Bracket F1030-60909 26 Bottom Case Bottom Case F1030-60910 Bottom Case (silver) F1052-60908 27 Top Case Top Case F1030-60911 Top Case (silver) F1052-60907 28 LCD Display Assy (new) F1030-60904 29 Keyboard Keyboard USA F1030-80013 Keyboard German F1030-80031 Keyboard Spanish F1030-80032 Keyboard French F1030-80033 Keyboard International English F1030-80057 30 Logic PCA Logic PCA (new) F1030-60907 Logic PCA (new) F1033-60907 Logic PCA (new) F1052-60906 Logic PCA (exchange) F1052-69008 31 System ROM System ROM (ABA) - US English F1033-60908 System ROM (ABB) Int. English F1033-60909 System ROM (ABD) German F1033-60910 System ROM (ABF) French F1033-60911 System ROM (ABE Spanish) F1033-60912 System ROM (ABA) US English F1037-60903 System ROM (ABB) Int. English F1037-60904 System ROM (ABD) German F1037-60905 System ROM (ABE) Spanish F1037-60906 System ROM (ABF) French F1037-60907 32 Battery Pack F1045-60901 33 Hard Drive Tray F1065-60029 34 Flash Tray F1030-60923 35 Mass Storage 5 MB Flash Disk Card F1012-60902 10 MB Flash Disk Card F1013-60901 20 MB Flash Disk Card F1014-60901 40 MB Hard Drive (DOS/Win/PIM) F1035-60901 40 MB Hard Drive (unprogrammed) F1050-60901 105 MB Hard Drive (DOS/Win/PIM) F1037-60908 105 MB Hard Drive (Word/Excel) F1037-60909 105 MB Hard Drive (unprogrammed) F1039-60901 130 MB Hard Drive (unprogrammed) F1057-60901 130 MB Hard Drive (programmed) F1052-60909 Note, this is a partial parts list. For a complete parts list, please refer to Appendix D or the current Product Support Plan. 1 2 3 4 5 6 7 8 9

7

Part 2

Troubleshooting
· OmniBook Self Test · Troubleshooting Flowchart

OmniBook Self-Test
The OmniBook Self-Test provides on-board hardware and firmware diagnostics. To operate the self-test, perform the following steps: 1. 2. 3. 4. 5. Save all files and close all applications: The OmniBook is reset at the end of the self-test. Turn the OmniBook OFF. Press and hold the [Esc] key and press [ON]. You will hear a short three-tone beep. Self Test will initialize and start. To run a test: Highlight the test name and press [ENTER]. Highlight the test name and press [Ctrl][ENTER] to run a longer and more extensive version of a test--not available for all tests. The test runs and its results are reported. 6. To run several tests in a continuous loop: Highlight one or more using [ space bar ] and press [ENTER]. Each test runs and its results are reported. Press [Backspace] to stop the loop. 7. To exit the self-test, press [Esc]. Interpretation of test results A result of "OK" on any test indicates that the test did not find problems while the unit was operating in its current state. A "BAD" result indicates that the test found a problem while the unit was operating in its current state. A "BAD" result should always be confirmed by running the test in a loop for several iterations or running the long version of the test. Further inspection of the unit to rule out configuration or installation conflicts is necessary prior to diagnosing the unit as needing repair. Any test that is halted by [Backspace] is shown as "aborted" and no results are displayed. The OmniBook will not enter sleep mode while the self-test is executing.

Loop Back Connectors
In order to run the RS232 serial port or parallel port self-test, a loop back connector is needed. The loop back may be placed on either the OmniBook port or at the end of the corresponding cable. This feature is also helpful in diagnosing a defective serial or parallel cable. Loop back connectors may be purchased or can easily be constructed. The following illustrations identify the correct pin-out configurations for the serial and parallel loop back connectors.

10

Figure 3 - Serial Loop Back Connector

Figure 4 - Parallel Loop Back Connector

11

Troubleshooting Flowchart
The following series of flowcharts is intended as a guide for troubleshooting the OmniBook 300, 425, 430, and 530. Each technician should still rely on personal experience and supplemental knowledge when diagnosing a problem. These tips should be kept in mind when referencing the troubleshooting flowcharts: · · · Use the Main Troubleshooting Flowchart to isolate the problem to a particular area. Use the additional individual troubleshooting flowcharts to narrow down the problem to a specific component or item. Always use supplemental information resources, including the Product Support Plan, Service Notes, and the World Wide Web, to aid in diagnosing problem areas.

12

Main Troubleshooting Flowchart

START No See DOS or Windows? Get user information: Name Telephone number Unit serial number Repair history See Hard Disk flowchart

Yes No Memory OK? (No memory errors)

Yes Eliminate all obvious physical problems? Yes No OB unit's power light comes on? Yes No Isolate damage. Refer to repair process Yes No Hard disk operates OK?

See Memory flowchart

See Hard Disk flowchart

See Power Source flowchart

Yes No Single beep during boot-up? See Bootup flowchart

Unit has at least 11/2 hours battery life?

No

See Power Management flowchart

Yes

Yes See something in display? No See Display flowchart

Pop-out mouse works correctly?

No See Mouse flowchart

Yes

External floppy drive operates correctly? Yes A

No

See Floppy Drive flowchart

13

Main Troubleshooting Flowchart (continued)

A

Parallel port operates correctly?

No

See Parallel Port flowchart

Yes No

If you still have a problem, it's in software or in a part of the unit not covered by these flowcharts.

Serial port operates correctly? Yes

See Serial Port flowchart

External VGA operates correctly?

No

See Serial Port flowchart

Yes

PCMCIA cards operate correctly?

No See PCMCIA flowchart

Infrared port operates correctly?

No See IR flowchart

Yes

14

Power Source Problems

Start: No power lamp, or low battery life

Yes

Battery in Omnibook?

No

Turn Omnibook off

Remove and reinsert battery

Yes

HP ac adapter and cable?

No

Connect OB to ac adapter, plug adapter into wall socket

Done

Turn on Omnibook

Yes

See power light?

No

Light on continuously (not intermittent)?

Try different power socket

B A

15

Power Source Problems (continued)

A

B

Yes

Light on continuously (not intermittent)?

No

Try different power socket

Recheck cables, connections: ac adapter to Yes Ambient temperature within specification? No Yes No

Yes

See power light?

No

Light still intermittent?

Done: Power source problem Done

Done: Bring temperature within specifications

Done: Suspect bad ac adapter, cable, or connector

Ensure power coming from wall socket Ensure battery installed correctly

Go to Power Management Problems flowchart

C

16

Power Source Problems (continued)

C

Yes

Can you substitute known good ac adapter?

No

Yes

See steady power light?

No

Yes Done: Original ac adapter or cable bad

Can you substitute known good OB?

No

Yes

Ac adapter warm?

No

Yes

See steady power light?

No

Done: Suspect original OB base unit bad

Done: Suspect bad ac adapter or cable

17

Boot-Up Problems

Start: Problems during bootup

Press Ctrl Alt Del to get a clean boot

Multiple beeps

Hear single or multiple beeps during boot?

Single beeps

Yes

See Windows or DOS prompt in display? Yes

No

Done

OB support utility disk available?

No

Yes

OB support utility disk available?

No

Suspect software problem: locate OB support utility disk and call back

Insert OB support utility disk and reboot

Yes Done

See prompt to enter time and date?

No

Done: Suspect bad Omnibook base unit

18

Display Problems

Start: Power light on, but no display

Physical inspection of display

Adjust brightness and contrast controls

Yes

See anything in display?

No

Done

Go to Boot-Up Problems flowchart

19

Hard Disk Problems

Start: Hard disk fails to boot up to DOS or Windows; or other hard disk problems

Yes

See anything in drive C:? No

No

Yes

HP hard disk? No

Insert hard disk in C:

Yes

Noisy?

Done Speech: Need hard disk to boot correctly

Yes Done: Hard disk bad

See "Nonsystem disk"?

No Done

Insert hard disk containing system files

Suspect corrupt files on hard disk

Done

Boot from OB companion disk in drive A:

Do SCANDISK C:

Yes

Soft checking OK?

No

A

B

20

Hard Disk Problems (continued)

A

B

Do hard checking. Save logs. Let SCANDISK repair errors.

Do hard checking. Save logs. Let SCANDISK repair errors.

Yes

Space available on hard disk within spec?

No

Boot from OB companion disk in drive A:

Done: Hard disk bad Boot from drive C:

Do SCANDISK C:

Do CHKDSK C:

Yes

Boots without errors?

No

Yes

No Number of bad sectors out of spec? Suspect software problem

Done

Done: Hard disk bad

Boot from OB companion disk in drive A:

Go to Boot-Up Problems flowchart

Do SCANDISK C: /AUTOFIX

C

21

Hard Disk Problems (continued)

C

Remove disk from drive A:

Boot from drive C:

Yes

DOS and Windows boot OK?

No

Done

Give customer general data recovery hints

Yes

Is customer willing to reformat hard disk?

No

Boot from drive A: Done: Customer must purchase another hard disk Back up hard disk to A:

Reformat hard disk

Reload image

Done

22

Memory Problems

Start: Problem with plug-in memory

Yes

Intermittent problem?

No

Run short OB memory self-test

End current session.

Yes

Memory self-test OK?

No

Exit software and turn off OB

Run long OB memory self-test

Remove OB battery, disconnect ac adapter

Yes

Memory self-test OK?

No

Remove and examine memory module

Run different software to eliminate potential software

Done: Suspect bad memory module Yes

Module appropriate and compatible?

No

Yes

Memory appears OK now?

No

With memory module removed, replace battery, attach ac adapter

Done: Suspect memory module problem

Done

A

Done: Memory inappropriate for this model OB

23

Memory Problems (continued)

A

Power up OB (memory module removed)

Yes

Memory problem disappears?

No

Done: Suspect bad memory module

Run short OB memory self-test (without memory module)

Yes

Memory self-test OK?

No

Run long OB memory self-test (without memory module)

Yes

Memory self-test OK?

No

Done: Suspect memory module bad

Done: Suspect OB base unit bad

24

Power Management Problems

Start: Low battery life Yes See OB power icon? No

Physical inspection: HP battery? Contacts dirty? Physically OK?

Done: Suspect software problem Yes Is Windows running? No

Yes

Ac adapter attached to OB and wall?

No

Start Windows Attach ac adapter OB Power icon in Control Panel?

Yes Yes Has unit recharged sufficiently? No

No

Yes Recharge sufficiently 1-1/2 hours per charge?

Power Mgmnt icon in OB Tools?

No

Yes

No Speech: Standard or Off means processor always on; uses more power

Yes

Power on during recharge?

No

Ensure power on Done DOS or Windows running?

Yes

No

Enable OB power management

Start DOS or Windows A

Done

25

Power Management Problems (continued)

A

Yes

Does battery indicator reach full charge?

No

Yes

Ambient temperature in spec?

No

Bring ambient temperature within specification, recharge battery No Charging circuitry may be defective

Yes

"Bad/no battery" message?

Ensure ac adapter plugged into OB and wall

Yes

PCMCIA cards installed?

No

Clean boot: Ctrl Alt Del, press F4 during boot

Yes Speech: PCMCIA cards can use power even when not on

3rd-party software installed?

No

Yes

"Bad/no battery" message?

No

Remove PCMCIA cards, recharge battery

Speech: DOS games, TSR's, other software can reduce battery life

Done: Replace battery or use OB on ac power only

Yes

Get 1-1/2 hours battery life?

Disable 3rd-party software and recharge battery No

Done B

26

Power Management Problems (continued)

B

Yes

Get 1-1/2 hours battery life?

No

Done

Use MSD to determine what TSR's are running

Disable TSR's

Yes

Get 1-1/2 hours battery life?

No

Done

Done: Suspect bad or old battery

27

Pop-Out Mouse Problems

Start: OB popout mouse problem

Eliminate obvious physical problems

Yes

See Windows?

No Start Windows running

Yes

Is mouse OB popout mouse?

No

Disable other mouse

Enable OB popout mouse

Yes

See mouse pointer?

No

Yes

Does mouse pointer move?

Done: Suspect software problem (Windows problem)

A

B

28

Pop-Out Mouse Problems (continued)

A

Yes

Reaches all 4 corners of screen? Yes

No

Can you calibrate mouse?

No

Yes

Is mouse jittery, intermittent?

No

Done: Mouse should be OK

Suspect bad mouse

C

29

Pop-Out Mouse Problems (continued)

B

Suspect software configuration problem

Yes

Setup shows correct mouse driver?

No

Check for correct OB mouse driver Configure Setup for correct OB mouse driver Yes Look at mouse in Windows Control Panel Done: Replace with known good version of correct OB mouse driver Yes See OB punch button? No Done: Mouse OK Mouse driver OK? No

Yes

Mouse moves?

No

Set Control Panel for OB punch button mouse Suspect bad mouse Yes OB mouse works OK? No

Done

Exit Windows, run Setup from DOS command line

C

30

Pop-Out Mouse Problems (continued)

C

Clean boot: Ctrl Alt Del, press F5 when starting

Yes

Can you put suspect mouse in known good OB?

No

Run OB diagnostic program

Yes

Suspect mouse works in known good OB?

No

Yes

Does mouse pass all tests?

No

Put known good OB mouse in suspect base unit

Boot normally to Windows

Remove mouse from OB base unit, examine mouse, and reinsert No Run OB diagnostic program

Yes

Known good mouse works?

No

Yes

OB mouse operates correctly?

Suspect bad mouse.

Done: Suspect software problem Yes Done

Does mouse pass all tests?

No Done: Suspect bad OB base unit

Replace mouse. Have customer call back if problem not solved.

Done

31

Floppy Drive Problems

Start: External floppy disk drive problem

Yes

External FDD is HP device? No

No

Yes

Cable is correct one?

Done

Eliminate obvious physical problems: Cable OK? Pins not bent? Cable connected and solidly in connectors?

Locate and attach correct cable

Yes

Drive works OK?

No

Done Inserts, ejects known good disk cleanly?

Yes

No

Yes

Has drive ever worked?

No

A

B

Done: Suspect bad or damaged drive

32

Floppy Drive Problems (continued)

A Clean boot: Ctrl Alt Del, press F5 during boot

Yes

Drive works OK?

No

Done Run short selftest twice Can you swap with known good drive and cable?

Yes With original OB turned on, connect good drive and cable

No

Yes

Drive passes self-test OK?

No

Suspect software problem (proceed to B) Yes Good drive works OK? No

Done: Suspect bad drive

With known good OB turned on, connect original drive and cable

With known good OB turned on, connect original drive and cable

Yes

Original drive works OK?

No Yes Original drive works OK? No

Suspect software problem

Original drive or cable bad

Original OB base unit bad

Suspect software problem

33

Floppy Drive Problems (continued)

B

Clean boot: Ctrl Alt Del, press F5 during boot Yes Run OB disk self-test: Put empty, known good disk, formatted for DOS, in drive. Press Enter. Disk self-test OK? No

Boot from drive A: with OB companion disk Change diskette, run self-test again

Yes

Boots OK?

No

Repeat disk self-test

Insert blank, formatted floppy disk, do long-term disk self-test

Yes

Self-test OK?

No

Yes

Long-term self-test OK?

No

Suspect bad floppy diskette; replace floppy with known good one

Done: If long-term self-test works but floppy drive still has problem, suspect runtime environment software problem

Done: Suspect bad floppy drive

34

Parallel Port Problems

Start: Problem with parallel port Use PRN command to print a file Yes Problem with Laplink Remote? No Yes Prints file OK? No

Troubleshoot Laplink Remote Done: Parallel port OK Yes Physical inspection: Cable connected? Cable pins OK? No

Other printer available?

Attach OB and use PRN command to print file on different printer

Clean boot: Ctrl Alt Del, press F5 during boot

Yes

Prints file OK?

No

Yes

See Windows?

No Done: Suspect bad printer or cable

Exit to DOS

Run OB self-test diagnostics: CDIAG or OBTEST, depending on unit

A

35

Parallel Port Problems (continued)

A

Yes

Self-test OK?

No

Reconfirm: Printer plugged in? On? On line?

Done: Bad OB base unit

Attach printer to desktop PC

Clean boot to DOS on desktop PC: Ctrl Alt Del, press F5 during boot

Yes

PRN prints file OK?

No

Done: Suspect original OB bad

Done: Suspect bad printer or cable

36

Serial Port Problems

Start: Problem with serial port

Yes

Problem with Laplink Remote?

No

Troubleshoot Laplink Remote

Install loopback connector

Run OB self-test procedure

Physical inspection: Cable connected? Bent pins? Cable appears OK?

Yes

Self-test OK?

No

Connected to what? Modem? Printer? Other?

Done: Serial port OK Yes Done: Suspect bad serial port in OB base unit Loopback connector available? No

A

37

Serial Port Problems (continued)

A

Ensure proper default serial port configuration

Yes

Serial port works OK?

No

Done Yes

Can you eliminate all potential software conflicts?

No

Eliminate software conflicts

Yes

Serial port works OK?

No

Done

Plug another device and cable into serial ports

Yes

Serial port works OK?

No

Done: Suspect original device or cable bad

Done: Suspect bad OB base unit serial port

38

PCMCIA Problems

Start: PCMCIA card problem

Determine type of card

Yes

Known issue with this card?

No

Seek additional information on card

Yes

Has card ever worked?

No

Yes

Has any software been loaded or modified since card worked?

No

Remove card (with power on or off)

Visually inspect card: Connectors bent? Damaged? Wet? Suspect software configuration problem Yes Inspection reveals problems? No

Reinsert card Done: Suspect bad PCMCIA card B A

39

PCMCIA Problems (continued)

A

B

Clean boot: Ctrl Alt Del, press F5 during boot

Press Ctrl Alt Del

Run OB self-test Yes See Windows display? No

Yes

Self-test OK?

No Exit to DOS prompt Yes Suspect bad card See DOS prompt? No

Done: Software configuration or setup problem

Exit to DOS prompt

Yes

HP card?

No

Remove card and run CARDINFO

Done: Return card to HP

Done: Contact card vendor

Interpret CARDINFO results

C

40

PCMCIA Problems (continued)

C

Yes

Hardware problem?

No

Done: Suspect bad OB base unit

Yes

Software problem?

No

Check CONFIG.SYS and AUTOEXEC.BAT

Insert card in top slot

Run CARDINFO Done

Insert same card in bottom slot Yes Hardware problem in both slots? No

Suspect bad card

Run CARDINFO

Yes

Card is HP device?

No

Interpret results

Done: Contact card vendor Done: Replace card

D

41

PCMCIA Problems (continued)

D

Yes

Hardware problem in one slot only? Yes

No

Done: Suspect bad OB base unit

Software problem in both slots?

No

Yes

Software problem in one slot only?

No

Seek further information consult with Technical Support

Done: Suspect software configuration problem

Done

42

IR Port Problems

Start: Problem with infrared (IR) port

Yes

Problem with Laplink Remote?

No

Clean boot: Ctrl Alt Del, press F5 during boot

Troubleshoot Laplink Remote Run OB self-test

Physical inspection: IR port not covered? Painted over? Obscured? Yes Ensure operating distance within specification (1 meter or less)

Run IR self-test in proper environment

IR self-test OK?

No

Done: Suspect software problem

Move OB to different desk, room

Ensure operating environment OK: Not next to bright or oscillating light? Yes IR self-test OK?

Run IR self-test in proper environment

No

Done: Suspect no problem or software problem

Done: Suspect bad OB base unit

43

Part 3

Hardware Repair
· Battery · Memory · Hard Disk Drive/Flash Card and System ROM · Mouse · Small Parts · Display · Keyboard · Logic PCA Board · Paw Carrier · Other Components
CAUTION: Always provide proper grounding when performing any of the following repairs. An electrostatic discharge may cause irreparable damage to the OmniBook and its components

Battery (End User Replaceable)
All of the monochrome OmniBook models use the same HP Nickel-Metal-Hydride (NiMH) Battery Pack, part number F1045A (service replacement part number F1045-60901). However, for some models, 1.5 V AA batteries can be used in place of the NiMH battery pack. The following table lists all of the monochrome OmniBooks and the batteries that can be used safely in each model. OmniBook 300 · NiMH Battery Pack · AA Alkaline · AA Lithium · NiMH Battery Pack · AA Lithium OmniBook 425 · NiMH Battery Pack · AA Alkaline · AA Lithium · NiMH Battery Pack · AA Lithium OmniBook 430 not applicable OmniBook 530 not applicable

Flash Disk Version

Hard Disk Version

· NiMH Battery Pack · AA Lithium

· NiMH Battery Pack

WARNING:

Do not mutilate, puncture, or dispose of batteries in fire. The batteries can burst or explode, releasing hazardous chemicals. A nickel-metal-hydride rechargeable battery pack must be recycled or disposed of properly. Recycle or discard used size-AA batteries according to the manufacturer's instructions.

Required Equipment · none Removal Procedure 1. Release the two latches on the battery cover on the bottom case, then remove the cover. Refer to the below illustration. 2. Do one of the following to remove the battery: · If an OmniBook battery pack is installed, lift it out by its tab. · If AA batteries are installed in place of the OmniBook battery pack, lift each out individually.

46

Replacement Procedure 1. To replace the battery, do one of the following: · To replace the OmniBook battery pack, insert the rounded side of the pack into the compartment first. It is not possible to fully insert the battery pack incorrectly. · To replace AA batteries, orient them as shown by the symbols in the battery compartment. 2. Replace and latch the battery cover.

47

Memory (End User Replaceable)
The OmniBook 530 uses a unique memory module that is not compatible with the OmniBook 300, 425, or 430. The table below summarizes the compatibility of the memory modules for each OmniBook model. Memory Module 2-MB 4-MB 4-MB 8-MB Accessory Number F1041A F1042A F1054A F1055B Service Replacement F1041-60901 F1038-60901 F1054-60901 F1055-60002 OB 300 OB 425 OB 430 OB 530

The following illustration provides a visual representation of the physical differences between the memory module for the OmniBook 300, 425, and 430 and the memory module for the OmniBook 530.

OmniBook 300, 425, and 430

OmniBook 530

Figure 5 - OmniBook Memory Modules

48

Required Equipment · Probe (or similar device) for the OmniBook 300, 425, and 430 only

CAUTION:

To avoid damage due to electrostatic discharge, handle the memory module by the edges only.

Removal Procedure 1. Remove the battery and ac adapter from the OmniBook. 2. Slide the memory door off (see below illustration).

Figure 6 - Removing the Memory Module

3. Perform the appropriate action for the corresponding OmniBook: · OmniBook 300, 425, or 430 -- Use a probe or similar device to pull on the small post located on the front edge of the memory module. · OmniBook 530 -- Flip out the plastic tab on the memory module and pull the module out.

Replacement Procedure 1. Insert the memory module into the slot. (It is not possible to completely insert the memory if it is upside down.) · OmniBook 300, 425, 430 -- the small post on the board faces the bottom surface of the OmniBook. · OmniBook 530 ­ the plastic tab on the board faces the bottom surface of the OmniBook. 2. Press in the module until it seats fully. 3. Replace the slot cover. 4. Replace the battery and press reset.

49

Hard Disk Drive/Flash Card and System ROM (End User Replaceable)
The Hard Disk Drives for the OmniBook 300, 425, 430, and 530 can be reimaged if necessary. If the software is corrupted, or otherwise damaged, on the hard drive, it can be reformatted and the software reloaded. Also, if the hard drive fails and must be replaced, a blank hard drive can be ordered and the appropriate software loaded. The below procedures indicate the proper actions necessary for reloading software on each OmniBook model. For the OmniBook 300 and 425: 1. Place the hard drive into the OmniBook. 2. Reformat the hard drive. 3. Run OBSETUP /F from the System ROM to reload the software onto the hard drive. For the OmniBook 430: 1. Place the hard drive into the OmniBook. 2. Reboot and press Alt then D to boot from the System ROM. 3. Reformat the hard drive. 4. Reload the software image from a set of OmniBook 430 Recovery Disks. The Recovery Disks are available on the HP Internal WW Web at http://webmcd.cv.hp.com/prodsupp/archive/. For the OmniBook 530: 1. Place the hard drive into the OmniBook. 2. Boot from the Companion Disk or other bootable floppy disk. 3. Reformat the hard drive. 4. Reload the software image from a set of OmniBook 530 Recovery Disks. The Recovery Disks are available on the HP Internal WW Web at http://webmcd.cv.hp.com/prodsupp/archive/.

50

Required Equipment · none Removal Procedure 1. Exit all applications, including Windows. 2. Turn the OmniBook off and remove the battery and ac adapter. 3. Turn the OmniBook over, release the two latches on the bottom of the tray, and pull out the tray. See below illustration.

Figure 7 - Removing Card Slot Tray 4. Lift the Hard Disk, Flash Card, or System ROM out of the tray. Replacement Procedure 1. Reverse the above steps to replace the Hard Disk, Flash Card, or System ROM. 2. Replace the battery and ac adapter. 3. Press reset.

51

Mouse (End User Replaceable)
Required Equipment · none Removal Procedure 1. Press the mouse-eject button to eject the mouse. 2. Pull the mouse firmly away from the OmniBook (see below illustration). The entire mouse assembly will pull free.

Figure 8 - Removing the Mouse

Replacement Procedure 1. Place the end of the mouse "stick" into the mouse housing. 2. Slide the mouse into the slot and firmly push the mouse until it is completely flush with the side of the OmniBook.

52

Small Parts (End User Replaceable)
The following small parts are all end user replaceable.

Battery Door
Push the two battery door latches away from the battery door. Remove the battery door by lifting up at the notch in the bottom case. Place the battery door, tab side first, over the battery compartment. Slide the two battery latches in place to secure the door.

Battery Door Latch
Once the battery door is removed (see above), the battery door latches will slide out of the bottom case. To replace, align the sides of the latches with the groves in the slots. Press firmly into place.

Blank Modem Door
Use a flat-blade screwdriver or similar device to press the small latch on the bottom of the blank modem door. Pull the door free of the bottom case. To replace, simply reinsert the door into the modem slot and press firmly.

Memory Door
Use a flat-blade screwdriver or similar device to pry the memory door from the bottom case. Replace by aligning the edges of the door with the slots on the bottom case. Press firmly into place.

I/O Door
To remove the I/O door, open it fully. Flex the middle of the door until the side pins clear the holes in the back case. Reverse to replace.

Rubber Feet
Place a probe or similar device between the rubber foot and the plastic of the bottom case. Pry upward to pop the foot out. To replace, firmly press the foot into the hole.

PCMCIA Card Tray
Slide the two tray latches toward each other. Pull the tray out of the card slot. If present, remove the PCMCIA card from the tray. To replace the tray, insert into the appropriate card slot. Slide the two latches away from each other to secure the tray.

53

Display (HP Authorized Service Providers Only)
Required Equipment · Appropriate ESD station · Torx #6 screwdriver · 5mm Hexdriver · Two small flat tip screwdrivers (or similar prying devices) · Probe Removal Procedure 1. Remove the battery, ac adapter, mass storage, system card (if applicable), memory module (if installed), modem (if installed), mouse, and any installed PCMCIA accessory cards. 2. Remove the four Rubber Feet and seven Screws from the bottom case (see below illustration).

Door - Battery Screw M2x4.6mm(T6) (Qty 6) Battery

Rubber Foot (Qty 4)

Figure 9 - Outer Bottom Case Components

54

3. Remove the I/O Door and the four standoffs located on the I/O backplane (see figure below).

Figure 10 - Backplane Standoffs

4. Two flat tip screwdrivers, or similar prying devices, are needed to remove the Top Case and Display Assemblies. Four plastic tabs hold the Top Case and Bottom Case together. Two tabs are located in each PCMCIA slot (see below illustration). Note, the screws seen in the PCMCIA slot do not need to be removed.

Figure 11 - Bottom Case Tabs

55

Place a prying device at a tab location between the metal and plastic of the Bottom Case (see figure below, left). Place another prying device in the PCMCIA eject button (see figure below, right). To release the tab, simultaneously twist prying device A while lifting on prying device B. Use caution with this maneuver, as the plastic tabs can break off the Bottom Case. If this occurs, the Bottom Case must be replaced.

Prying device "A"

Prying device "B"

Figure 12 - Bottom Case Prying Locations

5. Perform step four for each of the four tabs. 6. Once the Bottom Case tabs are released, the Bottom Case and Top Case are being held together only by the display cable and the two keyboard cables. Do not allow the Top Case and Bottom Case to separate at this point. The display cable and keyboard cables will be damaged if they are not properly disconnected. 7. Use a prying device to increase the separation of the Top Case and Bottom Case (see figure below). Do not separate the Top Case and Bottom Case more than 1 cm. A separation greater than 1 cm will damage the keyboard flex cables by pulling them out of the zero-force insertion connectors. The intent is to be able to view the display cable, located to the left of the ac adapter socket.

Display Cable

Figure 13 - I/O Port Prying Location

56

8. With the separation increased slightly, the display cable can be disconnected using a probe. Use caution to keep the OmniBook on a level surface. With the Top Case partially separated, small internal parts may dislodge when the OmniBook is tilted at a sharp angle. Place the probe at the base of the display cable connector between the two rows of pins. Use a rocking motion to lift the cable from the connector. See the below illustration for proper placement of the probe.

Figure 14 - Disconnecting Display Cable 9. With the display cable removed, the Top Case and Bottom Case can be opened partially to gain access to the keyboard flex cables (see below illustration). Do not open the unit completely as this will damage the keyboard flex cables by pulling them out of the zero-force insertion connectors. Open the zero-force insertion connectors and remove the keyboard flex cables. The Top Case can now be removed completely from the Bottom Case.

57

Figure 15 - Keyboard Flex Cables 10. To separate the Keyboard from the Display, five grounding eyelets must be removed from the display posts (see below illustration). Use caution when removing the grounding eyelets, as they can be broken off easily. If this happens, the assembly must be replaced. To prevent the eyelets from breaking, bend the grounding eyelet tabs at the farthest point from the eyelet.

Proper Tab Bend

Figure 16 - Display Grounding Eyelets 58

11. To remove the Display from the Top Case, the display cable and two grounding cables must be guided through the holes in the Top Case. Replacement Procedure 1. Guide the display posts, display cable and two grounding cables on the Display through the holes in the Top Case. 2. Replace the grounding eyelets over the display posts (see Figure 16). Use caution when replacing the grounding eyelets, as they can be broken off easily. If this happens, the assembly must be replaced. 3. Press the Display and Top Case firmly at each display post to snap the assembly in place. 4. Position the Top Case and Display Assembly over the Bottom Case and insert the two keyboard flex cables into the zero-force insertion connectors. Ensure the connectors are fully closed. Once the keyboard flex cables are secured in the connectors, do not allow them to be pulled out. This will damage the cables.

59

5. To reconnect the display cable, position a probe in the cable as shown in the below illustration.

Figure 17 - Display Cable Probe Position

6. Use the probe to connect the display cable into the connector as shown below. Use caution to keep the OmniBook on a level surface. With the Top Case partially separated, small internal parts may dislodge when the OmniBook is tilted at a sharp angle.

Figure 18 - Reconnecting Display Cable

7. With the display cable reconnected, the I/O grounding eyelets must be slid into place. Use caution when positioning the I/O grounding eyelets as they can be broken off easily. It is acceptable to reassemble the OmniBook with certain I/O grounding eyelets broken if there is at least one eyelet in each of the four positions AND at least two matched sets remaining. See Figure 19, Figure 20, Figure 21, and Figure 22 for examples.

60

Acceptable to reassemble All eyelets are present.

Figure 19 - I/O Port Eyelets (all present)

Acceptable to reassemble There are two matched sets and at least one eyelet in each position. Figure 20 - I/O Port Eyelets (two matched sets)

Not acceptable to reassemble There is only one matched set.

Figure 21 - I/O Port Eyelets (only one matched set)

Not acceptable to reassemble There are two matched set, but no eyelet in position one. Figure 22 - I/O Port Eyelets (no eyelet in position one)

8. Open the display and firmly press the Top Case and Bottom Case together around the entire parameter of the OmniBook. This will lock the tabs of the two cases. 9. Replace the seven screws and four standoffs and the remainder of the components.

61

Keyboard (HP Authorized Service Providers Only)
Required Equipment · Appropriate ESD station · Torx #6 screwdriver · Two small flat tip screwdrivers (or similar prying devices) · Probe Removal Procedure 1. Follow the Display Removal Procedure to separate the Display and Top Case from the Bottom Case. 2. Once the Display is removed, the Keyboard must now be separated from the Top Case. Hold the Top Case and Keyboard Assembly exactly as shown in the below illustration. Top Case and Keyboard Assembly (upside down)

Keyboard (upside down)

Backside of the Top Case icon panel.

Figure - Keyboard Removal Hand Placement 3. Apply even upward pressure with the fingers of the left hand. At the same time use the tip of the thumb of the right hand to twist the backside of the Top Case icon panel inward and toward the keyboard. There will be a slight bending in the plastic of the Top Case. This is normal and will not damage the assembly. Replacement Procedure 1. To replace the Keyboard, snap it into the Top Case. Ensure the entire perimeter of the Keyboard is securely snapped into place. 2. Follow the Display Replacement Procedure to replace the Display and remaining components.

62

Logic PCA Board (HP Authorized Service Providers Only)
Required Equipment · Appropriate ESD station · Torx #6 screwdriver · Two small flat tip screwdrivers (or similar prying devices) · Probe Removal Procedure 1. Follow the Display Removal Procedure to separate the Display and Top Case Assembly from the Bottom Case. 2. Remove the Eject Arms (both right and left) and Mouse Button Latch and Spring (see below illustration). Note, the Mouse Latch Spring is very small and can be misplaced easily. Screw M2x4.6mm(T6) (Qty 5) Eject Arm Right Mouse Button Latch

Eject Arm Left Mouse Latch Spring

Logic PCA

Paw Carrier Flex Cable Slot Eject Arm Spring Eject Button A

Eject Button B Eject Arm Spring Figure 23 - Logic Board PCA Removal

63

3. The Eject Buttons and Springs do not need to be removed to gain access to the Logic Board. However, because they can be dislodged easily, setting them aside is recommended. 4. Remove the Paw Carrier Flex Cable from the zero-force insertion slot. 5. Remove the five (5) screws from the Logic Board (see previous illustration). 6. The Logic Board can now be lifted from the Bottom Case. Replacement Procedure 1. To replace the Logic Board, reverse the steps in the Removal Procedure. Ensure the Paw Carrier flex cable is positioned properly ­ the end of the cable should be folded along the holes in the cable. This folded portion then needs to be placed between the posts and guided on the bottom case. 2. Follow the Display Replacement Procedure to replace the Display and remaining components.

64

Paw Carrier (Paw Active) (HP Authorized Service Providers Only)
Required Equipment · Appropriate ESD station · Torx #6 screwdriver · Two small flat tip screwdrivers (or similar prying devices) · Probe Removal Procedure 1. Follow the Logic Board PCA Removal Procedure. 2. Remove the Mylar Mouse Shield. Refer to the below illustration for location of components. 3. The Mouse Eject Arm and Eject Arm Spring may be removed at this point for convenience. 4. Gently bend the Pivot Bracket Tabs upward. Take caution not to break these tabs. If this occurs the Bottom Case must be replaced. 5. Remove the Pivot Bracket. 6. Lift the Paw Carrier from the plastic posts holding it in place. Mylar Mouse Shield Pivot Bracket

Paw Carrier Pivot Bracket Tabs (Qty 2) Mouse Eject Arm Eject Arm Spring

Bottom Case

Figure 24 - Paw Carrier Removal

Replacement Procedure 1. To replace the Paw Carrier, reverse the steps in the Removal Procedure. 2. Follow the Logic Board PCA Replacement Procedure to replace the Logic Board and remaining components.

65

Other Components (HP Authorized Service Providers Only)
The below table list additional replaceable components and the disassembly procedure(s) necessary to gain access to each. Component Top Case Disassembly Procedure(s) Display Keyboard Equipment Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Torx #6 screwdriver 5mm hexdriver Two flat tip screwdrivers Probe Special Notes

Bottom Case

Display Logic PCA Board Paw Carrier Display

Mouse Button Latch Mouse Latch Spring

Mylar Mouse Shield Pivot Bracket

Display Logic PCA Board

Eject Buttons (A&B) Eject Arms (L&R) Eject Arm Spring Pivot Doors (A&B) Pivot Door Spring

Display

Display

Hinge Cap

Display

The Hinge Caps simply slide off of the ends of the Display. Use a probe to remove the Security Latch from the Bottom Case.

Security Latch

Display

66

Appendix A - Technical and Resource Specifications
Mass Storage Specifications
40MB Average seek Track to Track seek Average Latency Rotational speed Data transfer rate Buffer to disc Buffer to host Buffer size Spindle start time < 19 ms 5 ms 6.67 ms 4503 rev/m 13-21 Mbits /sec 4.5 Mbytes /sec 32 Kbytes static RAM 1 sec typical 3 sec maximum 105MB 19 ms 6 ms 6.72 ms 4464 rev/m 11.4 - 19.2 Mbits/sec 4 Mbytes /sec 31 Kbytes <2 sec maximum 131MB 19ms 6 ms 6.72 ms 4464 rev/m 11.4 - 19.2 Mbits/sec 4 Mbytes/sec 31 Kbytes <2 sec maximum Flash Disk Cards (Typical) 2-3 ms NA NA NA 2.5 MBytes/sec 6.0 MBytes/sec NA NA

Card Services and Socket Services Version Matrix
Card Services Socket Services OB300 Card BIOS 1.0 1.01a OB425 Card BIOS 1.0 1.08 OB430 Card BIOS 1.0 1.14 OB530 2.1 2.1

67

Memory Map
300/425 430 430

SYSTEM BIOS

F VGA BIOS E

SYSTEM BIOS

ROM DOS

VGA BIOS
UMB SPACE

PCMCIA
UMB SPACE

D

C

B

PCMCIA UMB SPACE VGA RAM VGA RAM
OB300/425 64k OB430 64k + 32k OB530 112k contiguous

A

Upper Memory Block Space
UMB Space Available

DOS Conventional Memory
Windows DOS Box (with LapLink Remote) Exit Windows (with out LapLink Remote) OB300 315 KB 435 KB OB425 315 435 OB430 505 533 OB530 404 437

68

Appendix B - Power On Self Test Codes
Beep Codes
Beep Codes are used to identify a Power On Self Test (POST) error that occurs when the screen is not available. Once the screen is operational, diagnostic messages are reported to the screen. There are beep codes for both fatal and nonfatal system board errors. The codes are shown as x-y-z where 2-2-1 represents 2 beeps - pause - 2 beeps - pause - 1 beep.

Fatal Errors
1-1-1 1-1-3 1-1-4 1-2-1 1-2-2 1-2-3 1-3-1 1-3-2 1-3-3 1-3-4 1-4-1 1-4-2 2-1-1 2-1-2 2-1-3 2-1-4 2-2-1 2-2-2 2-2-3 2-2-4 2-3-1 2-3-2 2-3-3 2-3-4 2-4-1 2-4-2 2-4-3 2-4-4 3-1-1 3-1-2 3-1-3 3-1-4 3-2-4 3-3-4 3-4-1 3-4-2 3-4-3 CPU failure CMOS failure BIOS Checksum failure 8253 timer failure DMA setup failure DMA page register failure RAM refresh not verified SMI RAM bad Low 64K RAM failure Low 64K RAM even/odd failure Low 64K RAM address line failure Low 64K RAM parity error Low 64K RAM bit 0 error Low 64K RAM bit 1 error Low 64K RAM bit 2 error Low 64K RAM bit 3 error Low 64K RAM bit 4 error Low 64K RAM bit 5 error Low 64K RAM bit 6 error Low 64K RAM bit 7 error Low 64K RAM bit 8 error Low 64K RAM bit 9 error Low 64K RAM bit 10 error Low 64K RAM bit 11 error Low 64K RAM bit 12 error Low 64K RAM bit 13 error Low 64K RAM bit 14 error Low 64K RAM bit 15 error DMA #2 register error DMA #1 register error 8259 #1 error 8259 #2 error 8042 KB controller error Video initialization error Video retrace failure Video ROM-scan in progress Video ROM-scan error

Non-Fatal Errors
4-2-1 4-2-2 4-2-3 4-2-4 4-3-1 4-3-3 4-3-4 4-4-1 4-4-2 4-4-3 8253 timer tick test Shutdown/Restart sequence Gate A20 failure Unexpected virtual mode interrupt RAM test in progress 8253 timer channel 2 test Time of day clock test Serial port test Parallel port test Math coprocessor test

69

Display Codes
There are a number of Power On Self Test (POST) tests that are performed after the Beep Code tests. Failure of one or more of these tests will result in a displayed failure code (such as 0240). It is extremely important not to interpret a failure code immediately as a hardware failure. The failure should be confirmed with a clean boot. A clean boot is defined as pressing the reset button after removing all accessories (including memory cards, external floppy drive, modems, PCMCIA cards, and printers) and providing a reliable power source. The following list explains a number of POST Display Codes. Note, not all codes are available on all models of the OmniBook. No Error; Self-Test Routine Passed 80x86 Microprocessor Error BIOS ROM Checksum Errors 0000h test passed

000fh

MPU failed self test

0010h 0011h

errors relating to the BIOS rom checksums

Real Time Clock Errors

0110h 0120h 0240h 0241h 0280h 0282h

011X where X = bad register RTC clock tick error CMOS power bad CMOS checksum bad HP checksum bad EISA checksum bad

CMOS Errors

error code 0281 was previously used

8041 Errors

0301h 0302h 0303h 0305h 0306h 0307h 0308h 0311h 0312h 0341h 0342h 0342h 00343h 00344h 00345h 00346h 0350h 0351h

did not read 0AAH command did not respond to 0AAH command bad Response to 0AAH command did not respond when setting keyclick volume did not read 0C0H command did not respond to 0C0H command keyboard fuse is open did not read 060H command did not read data for 060H command did not read kbd interface test cmd did not respond to kbd intrf test add 1-4 to this to get kbd clock line stuck low kbd clock line stuck high kbd data line stuck low kbd clock line stuck high no ACK from kbd test bad ACK from kbd test

70

0352h 0353h 0354h

kbd not connected no response from kbd test kbd test failed

error codes 0304, 0313-0314, 0321-0323, 0331-033C were previously used

AUX Self Test Errors

03E0h 03E1h 03E2h 03E3h 03E4h 03E5h 03E6h 03E7h 03E8h 03E9h 03EAh 03EBh 03ECh

send enable-aux cmd to 8042 cmd byte failed 8042 failed to accept write-auxdevice cmd write-aux-device cmd not sent by 8042 reset-aux cmd not accepted by 8042 8042 failed to send aux-interface-test no reply for aux-interface-test cmd from 8042 aux device clock line stuck low aux device clock line stuck high aux device data line stuck low aux device data line stuck high no reply for aux-reset cmd from aux aux failed to perform reset send default cmd to 8042 cmd byte failed failed to switch to protected mode

Protected-Mode Switch Error

0401h

error code 0500 was previously used

Serial and Parallel Test Errors

0503h 0505h 0543h

no serial port bad serial port no parallel port kbd has keys stuck 06XXh where XX = the scan code of the stuck key timer failed to interrupt CPU clock too slow in SLOW speed CPU clock too fast in SLOW speed CPU clock too slow in FAST speed CPU clock too fast in FAST speed

Keyboard Device Errors

0600h

System Speed Test Errors

0702h 0703h 0704h 0707h 0708h

error codes 0700-0701, 0705-0706, 0709-070C were previously used

Timer Chip Errors

1100h 1200h 1201h

failed timer test 110Xh where X = failed timer # no refresh tick refresh signal stuck low X = slot number where error occurred

EISA Init Errors

13XY

71

1300h 1301h 1302h 1303h

1304h 1305h

Y = error type error code displayed if fdc is not configured properly error code if board is not ready error code if cmos says slot is empty but a card is present in the slot error code if cmos says slot does not have board with readable id but can read board id error code if cmos id and board id do not match error code if incomplete configuration bit is set bad port or wrong memory board bad port or wrong board type port reports null or no SIMMs can't mix single and double density SIMM parts physical SIMM config. invalid 20X5h X = the memory bank the checking routine stopped at - banks are numbered 0, 1, 2, or 3 bad memory controller DMA controller errors XY= 0001 bbbb = register bbbb of controller 01 failed write/read test XY= 0010 bbbb = register bbbb of controller 02 failed write/read test DMA status register errors X=0 => Controller 1's status register failed X=1 => Controller 2's status register failed DMA Page register errors XY= 0001 abbb = channel bbb of page register bad bit a 0 = ISA (0xxh) register 1 = EISA (4xxh) register DMA page mask

Memory Configuration (POST) Errors

2000h 2001h 2002h 2003h 2005h

2006H DMA Errors 21XYh

213Xh

22XYh

0010h

error codes 3000-3010 were previously used

Real-Mode (0-1Mb) RAM Errors

4000h

4XYZ - the interpretation of this