HP Omnibook Xe4500 Service Manual

HP Omnibook XE4100/XE4500 Removal and Replacement 2-37
Repairing the BIOS IC
(HP Authorized Service Providers Only)
The notebook’s BIOS IC cannot be replaced separately. If it is defective, you must replace the
motherboard. In some cases, however, you might be able to reprogram a malfunctioning BIOS IC using
either e-DiagTools for Windows, a BIOS floppy disk, or a Crisis Recovery floppy disk.
If the notebook will boot sufficiently, use e-DiagTools for Windows or a BIOS floppy disk to
reprogram the BIOS...

2-38 Removal and Replacement HP Omnibook XE4100/XE4500
Using a BIOS Floppy Disk
If you do not have a BIOS floppy disk, download the package from the Partnership web site (see page
vii) under Product Support Information in the Service and Support Library. Follow the instructions for
creating the BIOS floppy disk.
  Caution
 
Make sure to use the correct BIOS floppy disk for the Omnibook model you are repairing. The
program does not verify the Omnibook model, so you could accidentally install the wrong...

HP Omnibook XE4100/XE4500 Removal and Replacement 2-39
Removing Other Components
(HP Authorized Service Providers Only)
Required Equipment
 • Small Phillips screwdriver.
 • Small flat-blade screwdriver.
Removal Procedure
 1. Unplug the AC adapter, if present, and remove the battery.
 2. Remove the assemblies and follow the additional steps listed in the table below.
 
Table 2-5. Removing Omnibook XE4100/XE4500 Components
ComponentRemoval ProcedureAdditional Steps
Battery, CMOSKeyboard cover
(page 2-10)....

2-40 Removal and Replacement HP Omnibook XE4100/XE4500
ComponentRemoval ProcedureAdditional Steps
Guide, HDDKeyboard cover
(page 2-10).
Speaker (page 2-12).
Switchboard PCA
(page 2-13).
Keyboard (page 2-13).
CD/DVD (page 2-16).
Display (page 2-17).
Top case (page 2-20).W hen replacing the HDD guide, make sure you only
replace the two right screws. Do not replace the two
left screws.
Heatsink (with fan)See page 2-27.
KeyboardSee page 2-13.
Panel, wirelessKeyboard cover
(page 2-10).
Speaker (page 2-12)....

HP Omnibook XE4100/XE4500 Troubleshooting and Diagnostics 3-1
3 
Troubleshooting and Diagnostics
This chapter includes troubleshooting and diagnostic information for testing the functionality of the
notebook, and for identifying faulty components:
 • ASP support information
 • Troubleshooting information
 … Checking for customer abuse (page 3-3).
 … Troubleshooting the problem (page 3-3).
 … Verifying the repair (page 3-4).
 … Suggestions for troubleshooting (page 3-5).
 • Diagnostic tools
 … e-Diagtools...

3-2 Troubleshooting and Diagnostics HP Omnibook XE4100/XE4500
Troubleshooting
The suggestions in this section can help isolate and repair the cause of a problem. To ensure quality
repair, follow the basic troubleshooting steps shown below.
 
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...

HP Omnibook XE4100/XE4500 Troubleshooting and Diagnostics 3-3
Checking for Customer Abuse
Some notebooks might appear to have been damaged by customer abuse. Use these guidelines to help
determine if this is the case:
 • If the shipping box is seriously damaged, customer abuse cannot be declared.
 • If the damage could have a cause other than customer abuse, customer abuse cannot be declared.
 • If the notebook shows any of the following, customer abuse is declared:
 … Missing parts.
 … Broken plastic...

3-4 Troubleshooting and Diagnostics HP Omnibook XE4100/XE4500
Swapping modules that might be defective with others known to be good is generally an ideal way to
find the module responsible for the problem. A failure symptom is rarely caused by more than one
module, so you will not usually need to replace more than one to correct a particular failure.
After you replace a module, the notebook will normally be in a confused state and lock up when you
apply power. If this happens, press the reset button:...

HP Omnibook XE4100/XE4500 Troubleshooting and Diagnostics 3-5
Suggestions for Troubleshooting
  Table 3-2. Scope of Diagnostic Tools
Functione-DiagtoolsPower-On
Self-Test
Sycard
PCCtest 450
WMI/
Toptools
(if installed)
BIOS Setup
BootupTests Describes Configures
ProcessorTests Describes
MemoryTests Tests Describes Describes
FanTests
BatteriesTests (CMOS
battery only)Describes
DisplayTests Describes Configures
Hard diskTests Tests Describes Configures
Floppy driveTests* Tests Describes Configures...

3-6 Troubleshooting and Diagnostics HP Omnibook XE4100/XE4500
If you cannot isolate the cause of a problem using the above diagnostic tools, use the suggestions in the
following table to help find the problem.
  Table 3-3. Troubleshooting Suggestions
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
To help determine likely causes of a problem, determine which replaceable modules are involved in the system
function and what roles they play: see the figure on page 1-14...