HP Omnibook Xe2 Service Manual

							HP OmniBook XE2 Removal and Replacement 2-21
Removing Other Components
(HP Authorized Service Providers Only)
Required Equipment
 · Small Phillips screwdriver.
 · Pointed knife or probe (for display components).
 · 5-mm hex driver (or 3/16 inch) (for bottom case components).
Removal Procedure
 1. Unplug the AC adapter, if present, and remove the battery.
 2. Remove the additional assemblies and follow the special steps indicated in the tables below.
Components are separated into these groups:
 · Display components.
 · Top case components.
 · Bottom case components.
 Table 2-7. Removing Display Components
ComponentRemoval ProceduresAdditional Steps (See figure on page 4-3)
Display BezelDisplay (page 2-11)
LCD module (page 2-12).Remove the display bezel (page 2-12)..
Display CaseDisplay (page 2-11).
LCD module (page 2-12).Remove the LCD module and brackets from the case,
but do not disassemble the module (page 2-12).
HingeDisplay (page 2-11).
LCD module (page 2-12).Remove the display bezel (page 2-12).
Hinge CoverDisplay (page 2-11).
Inverter PCADisplay (page 2-11).
LCD module (page 2-12).1. Remove the display bezel (page 2-12).
2. Unplug both cables attached to or holding the
inverter PCA. Lift up the PCA if necessary.
LCD Brackets
(part of LCD kit)Display (page 2-11).
LCD module (page 2-12).
LCD Flex CableDisplay (page 2-11).
LCD module (page 2-12).
LCD ModuleSee page 2-12.
 Table 2-8. Removing Top Case Components
ComponentRemoval ProceduresAdditional Steps
KeyboardSee page 2-9.
Top CaseSee page 2-15.
 Table 2-9. Removing Bottom Case Components
ComponentRemoval ProceduresAdditional Steps (See figures on pages 4-2, 4-4)
BatterySee page 2-3. 
						

							2-22 Removal and Replacement HP OmniBook XE2
ComponentRemoval ProceduresAdditional Steps (See figures on pages 4-2, 4-4)
Bottom CaseKeyboard (see page 2-9).
Top case (see page 2-15).
CPU and motherboard
(see page 2-17).Remove heatsink, drives, PCAs, CPU module, and
motherboard (page 2-17).
CD-ROM DriveKeyboard (see page 2-9).
Top case (see page 2-15).Remove heatsink (page 2-17).
CPU Module / CPUSee page 2-17. Remove heatsink (page 2-17).
FanSee page 2-7.
Floppy Disk DriveKeyboard (see page 2-9).
Top case (see page 2-15).Remove heatsink (page 2-17).
Hard Disk DriveSee page 2-6.
HeatsinkKeyboard (page 2-9).
Top case (see page 2-15).
LED PCAKeyboard (see page 2-9).
Top case (see page 2-15).Remove heatsink (page 2-17).
Modem PCAKeyboard (see page 2-9).
Top case (see page 2-15).Remove heatsink (page 2-17).
MotherboardSee page 2-17.
RAM BoardSee page 2-4. 
						

							HP OmniBook XE2 Troubleshooting and Diagnostics 3-1
This chapter includes troubleshooting and diagnostic information for testing the functionality of the
OmniBook and identifying faulty modules:
 · Troubleshooting information
  Troubleshooting the problem (page 3-2).
  Verifying the repair (page 3-3).
  Suggestions for troubleshooting (page 3-4).
 · Diagnostic tools
  OmniBook hardware diagnostic program (page 3-11).
  Power-on self-test (page 3-16).
  Desktop Management Interface (page 3-20).
  BIOS Setup utility (page 3-22). 
						

							3-2 Troubleshooting and Diagnostics HP OmniBook XE2
Troubleshooting
The suggestions in this section can help isolate and repair the cause of a problem. To ensure quality
repair, HP recommends that you follow the basic troubleshooting steps shown in the illustration
below.
 
 Figure 3-1. Basic Troubleshooting Steps
Troubleshooting the Problem
Record pertinent information about the unit:
  Model and serial number.
  Operating system and version.
  BIOS version.
  Accessories and peripherals used.
Analyze the problem:
 · 
Observe Symptoms. Using the customer’s information, try to duplicate the problem. Determine
how the problem differs from proper behavior. Also, take note of the functions that do work
properly.
 · 
Separate Problems. If there is more than one symptom, separate them into distinct problems.
Check the customers description
of the problem and any supporting
information.
Try to duplicate the customers
problem.
Troubleshoot the problem using
  - Diagnostic tools.
  - Troubleshooting suggestions.
Verify the repair by testing the
functionality of the complete unit . 
						

							HP OmniBook XE2 Troubleshooting and Diagnostics 3-3
 · Consider Causes. Keep in mind possible causes for each problem. Use the diagnostic tools and
troubleshooting suggestions to help find possible causes.
  The OmniBook diagnostic program is the primary troubleshooting tool—it tests most
components using automatic and interactive tests. The table on page 3-4 shows how you can
use the different diagnostic tools to isolate the cause.
  The troubleshooting suggestions on page 3-5 include general suggestions for repairing units
with certain failure symptoms.
Swapping easily replaced modules with known-good modules is an ideal way to isolate the cause
down to the module level. It is rare for more than one module to be responsible for one failure
symptom. Therefore, replacement of more than one module for a particular symptom should be the
exception rather than the normal expectation.
After replacing a module, it is normal for the unit to be in a confused state and lock up when power is
applied. If this occurs, press the system-off button to restart the computer in a known state.
Verifying the Repair
Before returning the repaired unit to the customer, verify the repair by running the following tests:
 · 
Basic Diagnostic Test. Run the basic test of the OmniBook diagnostic program (page 3-11).
 –and–
 · 
Function Tests. Run tests that check the repaired function, such as in the OmniBook diagnostic
program (page 3-11).
 –and–
 · 
Failed Tests. Run any other tests that failed during troubleshooting. 
						

							3-4 Troubleshooting and Diagnostics HP OmniBook XE2
Suggestions for Troubleshooting
 Table 3-1. Scope of Diagnostic Tools
FunctionOmniBook
Diagnostics
Power-On
Self-Test
DMI/TopTools
(if installed)
BIOS Setup
BootupTests Describes
(SafeTools)Configures
ProcessorTests
(System menu)Tests Describes
(AssetTools)
MemoryTests
(Memory menu)Tests Describes
(AssetTools)Describes
BatteriesDescribes
(AssetTools)
DisplayTests (Video,
Mem,User menus)Describes
(AssetTools)
Hard diskTests
(IDE menu)Tests Describes
(AssetTools)Configures
Floppy driveTests
(FDD menu)Tests Describes
(AssetTools)Describes
KeyboardTests
(KBD menu)Tests Describes
(AssetTools)
PointerTests
(Misc menu)Describes
(AssetTools)Configures
AudioTests (System,
Misc menus)Configures
SerialTests*
(Misc menu)Describes
(AssetTools)Configures
ParallelTests*
(Misc menu)Describes
(AssetTools)Configures
Infrared
Tests†
(Misc menu)Describes
(AssetTools)Configures
PS/2 port
Tests† (KBD,
Misc menus)
USB
Tests†
(System menu)Describes
(AssetTools)
Docking portTests
(using docks)
PCMCIATests
(Misc menu)Describes
(AssetTools)
AC adapterStatus
(AssetTools)
Docking
productsTests ports and
internal busStatus
(AssetTools)Configures
CD-ROM
driveTests
(IDE menu)Tests (with boot
CD)Describes
(AssetTools)Configures
Other plug-in
modulesDescribes
(AssetTools) 
						

							HP OmniBook XE2 Troubleshooting and Diagnostics 3-5
If you can’t isolate the cause of a problem using the diagnostic tools, you can use the suggestions in
the following table to help find the problem.
 Table 3-2. Troubleshooting Suggestions
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
To help determine likely causes, check to see what replaceable modules are involved in the system function and
what roles they play. See the table on page 1-13.
Startup
Does not boot on
AC or batteryCheck the power source.
Push system-off button.
Unplug the AC adapter and
remove all batteries, then
reconnect power.
Remove any RAM board and
try again. Reinsert and try
again.AC adapter.
RAM board.
CPU module.
Motherboard.
I/O PCA.
LCD module.
Hard drive.Check AC adapter. Remove
any RAM boards and retry.
If power status light does not
turn on, replace
motherboard.
If power status light turns on
but display remains off, try
external monitor. If monitor
shows successful boot,
replace LCD module. If
monitor shows activity but
BIOS does not complete,
replace CPU module. If
monitor is blank, replace I/O
PCA, replace CPU module,
replace motherboard.
If power status light and
display turn on, BIOS
completes, but OS does not
start from hard disk or from
floppy drive, replace CPU
module, then motherboard. If
OS starts from floppy drive,
reload hard drive, replace
hard drive.
Does not boot on
battery (boots on
AC)Check battery level on
battery LEDs.
Check battery contacts. If
available, try another battery.Battery.
Motherboard.
Does not boot from
floppy driveCheck boot order in BIOS
Setup.
Check that floppy boot is
enabled in BIOS Setup.Floppy drive or
contacts.
Motherboard.
Error message such
as “Invalid system
disk” or “Auto IDE
error”Check for a disk in floppy
drive.
Remove and reinsert hard
drive.
Check boot order in BIOS
Setup.Hard drive contacts.
Hard drive.If unit boots from floppy drive,
check for corrupt files on
hard drive, reload hard drive,
replace hard drive.
Sluggish startup or
shutdownRun ScanDisk and Disk
Defragmenter to check and
optimize the hard drive.
Delete temporary and
unneeded files.Use same suggestions
shown at left. 
						

							3-6 Troubleshooting and Diagnostics HP OmniBook XE2
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Password has been
forgottenVerify proper ownership, then
follow the removal procedure
with the owner and log the
appropriate data—see page
5-1.The user must call Technical
Support and provide proof of
ownership. Password
removal is restricted to
certain sites. See page 5-1.
Power/Battery
Short battery
operating timeTurn down display
brightness.
Check power management
settings in BIOS Setup. Try
the default settings.
Inform user that certain
applications can cause
excess power usage. (User
can get power monitor from
www.intel.com and monitor
CPU load.)
Some PC cards (PCMCIA)
draw power even while not in
use.
Heavy modem use can affect
battery operating time.Battery.
Motherboard.Battery capacity often
decreases after a year or
more.
Does not run on
battery, empty
battery indicationCheck battery contacts. If
available, try another battery.Battery or contacts.
Motherboard.
Battery does not
chargeCheck the power source.
Check battery contacts. If
available, try another battery
and AC adapter.
Check for high ambient
temperature and blocked air
vents.Battery or contacts.
AC adapter.
Motherboard.
Fan.Check AC adapter.
Check fan.
Display
Dark display, no
lightAdjust display brightness.
Press Fn+F12 several times.
Try external monitor.LCD module
(backlight).
LCD cable or
connections.
Inverter PCA.Reseat the I/O PCA.
If an external monitor
displays no image, replace
the I/O PCA instead, then
motherboard.
White display Adjust display brightness. LCD module.
Inverter PCA.
Erratic display LCD cable or
connections.
LCD module.
Bright or missing
pixels or linesSee quality statement on
page 5-2.LCD module.
LCD cable or
connections.See quality statement on
page 5-2.
Hard disk
Hard disk never
spinsCheck the power source.
Remove and reinsert the
hard drive. Check the
contacts.Hard drive or
contacts.
Motherboard.
Hard drive case.If the drive case is damaged,
it can prevent proper
operation. 
						

							HP OmniBook XE2 Troubleshooting and Diagnostics 3-7
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Hard disk makes
clunking or
scratching noiseBack up the drive
immediately.
Was the computer or drive
dropped?Hard drive. Check the computer and
drive for evidence of
customer abuse.
Hard disk makes
buzzing or whining
noiseBack up the drive
immediately.
Check for alternate noise
sources, such as a PCMCIA
drive or fan.
If a keystroke causes the
sound to change, it may be
power supply noise.Depends on the
source of the noise.
Files are corrupted Run a virus scan program.
Check the disk surface by
running Scandisk (Windows
95/98) or Disk Administrator
(Windows NT). Or boot to
DOS and run CHKDSK to
look for problems, run
CHKDSK /f to fix.
Use Recovery CD to restore
original factory software.Use same suggestions
shown at left.
Drive capacity is
less than normalCheck the disk surface by
running Scandisk (Windows
95/98) or Disk Administrator
(Windows NT).
Check partitions using FDISK
(Windows 95/98) or Disk
Administrator (Windows NT).Hard drive. Use same suggestions
shown at left.
Recreate the Hibernate
partition, then partition and
format the disk.
Floppy drive
General problems Check floppy module
contacts.
Check settings in BIOS
Setup.Floppy module or
contacts.
Motherboard.
Keyboard
Some or all keys do
not work properlyKeyboard.
Motherboard.Try reinserting the flex cable
in the connector on the
motherboard.
PS/2 keyboard and
mouse with Y-
adapter do not workCheck devices separately. Y-adapter.
PS/2 device.
Motherboard.
Touch pad
General problems Check settings in Control
Panel.
Check that the touch pad is
enabled in BIOS Setup.Top case.
Motherboard.
Click button doesn’t
workTop case.
Motherboard. 
						

							3-8 Troubleshooting and Diagnostics HP OmniBook XE2
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Audio
Sound does not
playCheck settings in BIOS
Setup.
Increase sound volume
(Fn+UPARROW and
software controls).
Check whether mute is active
(mute button and software
controls).
Check for sound resource
conflicts in Device Manager
(Windows 95/98) or
Administrative Tools or
Control Panel System
(Windows NT).Speakers.
I/O PCA.
Motherboard.Check operation using
headphones or external
speakers.
Sound does not
recordCheck settings in BIOS
Setup.
Check software controls for
microphone—it should not be
muted in recording panel.
Note: The microphone
should normally be muted in
the master output panel.Inverter PCA (mic).
Motherboard.
I/O PCA.Check operation using
external microphone.
Serial/Parallel
General problems Check settings in BIOS
Setup.
Check settings in Control
Panel (and in Windows NT
Diagnostics).Motherboard. Use loop-back connector
during test—see page 3-13.
Infrared
General problems Infrared communication is not
supported in
Windows NT 4.0.
Infrared is disabled and no
drivers installed as shipped.
(Drivers are included.)
Check settings in BIOS
Setup.
Standard IrDA and fast-IrDA
are incompatible (they use
different drivers).
For fast-IrDA, check for DMA
conflict with ECP parallel
port.I/O PCA.
Motherboard.
USB
General problems USB is not supported in
Windows NT 4.0.Motherboard.