HP Omnibook 500 Service Manual

							HP Omnibook 500 Removal and Replacement 2-35
ComponentRemoval ProcedureAdditional Steps
Heatsink/fanSee page 2-21.
Panel, audio/PCMCIAHard disk drive (page 2-6).
Power button panel
(page 2-9).
Keyboard (page 2-10).
Switchboard PCA
(page 2-15).
Display (page 2-18).
Top case (page 2-23).Remove all three screws from the panel. Flip out the
PC Card eject button, so that it stands out from the
side of the unit, then remove the panel.
Reassembly Notes:
 Make sure the audio-out jack,
external microphone jack, and PC Card eject button fit
through their openings in the panel. Make sure the
forward screw lug on the panel lies on top of the screw
lug on the hard disk guide.
Panel, mini-PCIHard disk drive (page 2-6).
Power button panel
(page 2-9).
Keyboard (page 2-10).
Switchboard PCA
(page 2-15).
Display (page 2-18).
Top case (page 2-23).Reassembly Notes: Mini-PCI models only. 
Route
the panel’s cable (modem models) or cables
(LAN/modem models) to avoid interfering with
installation or operation of other components (see
Figure 2-12 on page 2-15). Make sure the cable or
cables are not trapped beneath the mini-PCI card or
heatsink and do not lay across the heatsink.
PCA, motherboardSee page 2-25.
Plate, EMI
(certain models only)Hard disk drive (page 2-6).
Power button panel
(page 2-9).
Keyboard (page 2-10).
Switchboard PCA
(page 2-15).
Display (page 2-18).
Top case (page 2-23).
Heatsink/fan (page 2-21).Remove the retaining screw, and lift the EMI plate out
of the unit.
SpeakerPower button panel
(page 2-9).
Keyboard (page 2-10).Remove both retaining screws, and disconnect the
speaker cable from the motherboard.
Reassembly Notes:
 It may be easier to set the
speaker grill in position first, then set the speaker in
place. Be careful not to trap the speaker gasket
beneath the heads of the retaining screws. 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-1
3 
Troubleshooting and Diagnostics
This chapter includes troubleshooting and diagnostic information for testing the functionality of the
Omnibook and identifying faulty components.
 
• Troubleshooting information
 
… Checking for customer abuse (page 3-3).
 
… Troubleshooting the problem (page 3-2).
 
… Verifying the repair (page 3-4).
 
… Suggestions for troubleshooting (page 3-5).
 
• Diagnostic tools
 
… Omnibook e-DiagTools diagnostic program (page 3-19).
 
… Power-on self-test (page 3-26).
 
… Sycard PCCtest 450 PC Card (page 3-29).
 
… Desktop Management Interface (page 3-30).
 
… BIOS Setup utility (page 3-31). 
						

							3-2 Troubleshooting and Diagnostics HP Omnibook 500
Troubleshooting
The suggestions in this section can help isolate and repair the cause of a problem. To ensure quality
repair, HP recommends that you follow the basic troubleshooting steps shown in the illustration
below.
 
Check the 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.
Check for customer abuse.
 Figure 3-1. Basic Troubleshooting Steps 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-3
Checking for Customer Abuse
Some units may 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 unit shows any of the following, customer abuse is declared:
 
… Missing parts.
 
… Broken plastic parts.
 
… Parts not original to the unit.
 
… Damaged or missing keys on the keyboard.
Table 3-2 includes additional criteria for determining customer abuse to specific parts of the unit.
  Important
 
Parts damaged by customer abuse are not covered by the warranty.
Troubleshooting the Problem
Record pertinent information about the unit:
 
• Model and serial number.
 
• Operating system and version.
 
• Software version (hidden file c:\version.inf).
 
• BIOS version.
 
• Accessories and peripherals used.
Analyze the problem:
 
• 
Observe Symptoms. Using the customer’s information, try to duplicate the problem. Determine
how the problem differs from proper behavior. Also, take note of the functions that 
do work
properly.
 
• 
Separate Problems. If there is more than one symptom, separate them into distinct problems. 
						

							3-4 Troubleshooting and Diagnostics HP Omnibook 500
 
• Consider Causes. Keep in mind possible causes for each problem. Use the diagnostic tools and
troubleshooting suggestions to help find possible causes.
 
… The e-DiagTools diagnostic program tests most of the computer’s components using
automatic and interactive tests, and will be your primary troubleshooting tool. Other tools
include the power-on self-test, DMI/Toptools (if installed), the BIOS Setup utility, and the
Sycard PCCtest. Table 3-1 on page 3-5 shows how you can use these tools to isolate the cause
of the computer’s problem.
 
… The troubleshooting suggestions on page 3-6 include general suggestions for repairing units
with specific failure symptoms.
Swapping components that may be defective with others known to be good is generally an ideal way
to find the component responsible for the problem. A failure symptom is rarely caused by more than a
single component, so you will not usually need to replace more than one to correct a particular failure.
After you replace a component, the computer will normally be in a confused state and lock up when
you apply power. If this happens, press the system-off switch: this resets the computer and starts it in a
known state.
Verifying the Repair
Before returning the repaired unit to the customer, verify the repair by running the following tests:
 
• 
e-DiagTools Basic Diagnostic Test. Run the basic test of the e-DiagTools diagnostic program
(page 3-19).
 – and –
 
• 
Function Tests. Run tests that check the repaired function, such as in the e-DiagTools
diagnostic program (page 3-19).
 – and –
 
• 
Failed Tests. Run any other tests that failed during troubleshooting. 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-5
Suggestions for Troubleshooting
  Table 3-1. Scope of Diagnostic Tools
Functione-DiagToolsPower-On
Self-Test
Sycard
PCCtest 450
DMI/Toptools
(if installed)
BIOS Setup
BootupTests Describes Configures
ProcessorTests
(System menu)Tests Describes
MemoryTests
(Memory menu)Tests Describes Describes
BatteriesTests (CMOS
battery only)Describes
(W in 98 only)
DisplayTests
(Video menu)Describes
Hard diskTests
(IDE menu)Tests Describes Configures
Floppy driveTests
(FDD menu)Tests Describes Describes
KeyboardTests
(KBD menu)Tests Describes
PointerTests
(Misc menu)Describes Configures
AudioTests (System,
Misc menus)
Serial
Tests* †
(Misc menu)Describes Configures
Parallel
Tests* †
(Misc menu)Describes Configures
LANDescribes
ModemTests**
(User menu)
Wireless
InfraredDescribes Configures
PS/2 port
Tests† (KBD,
Misc menus)
USB
Tests†
(USB menu)Describes Configures
Docking portTests
(System menu,
using docks)
PCMCIA
Tests* †
(Misc menu)Tests Describes
(W in 98 only)
AC adapterStatus
Expansion baseTests ports, CD
controls, and
internal busStatus Configures
Plug-in
modulesDescribes
* The diagnostic test is more thorough if you use a loop-back connector.
** The test checks only the internal hardware up to the mini-PCI card, and does not check the mini-PCI
panel or any external cabling.
†Use an appropriate external device (such as the expansion base) to exercise the port. See the help
text for the tests in the menu. 
						

							3-6 Troubleshooting and Diagnostics HP Omnibook 500
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 3-2. Troubleshooting Suggestions
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
To help determine likely causes, find out which replaceable components are involved in the system involved,
and what roles they play. See Figure 1-11 on page 1-19 and Table 1-9 on page 1-20.
Startup
Does not boot on
AC or battery.Check the power source.
Press the system-off switch
to reset the computer.
Unplug the AC adapter and
remove all batteries, then
reconnect power.
Remove any SDRAM
expansion module and try
again.AC adapter.
SDRAM module.
Motherboard.
Display assembly.
Hard drive.Check the AC adapter.
Remove any SDRAM
expansion module and try
again.
Replace the system SDRAM
module.
If the power mode light does
not turn on, reprogram the
BIOS; replace the
motherboard.
If the power mode light turns
on but the display does not,
try an external monitor. If the
monitor shows a successful
boot, replace the display
assembly. If the monitor
shows activity but the BIOS
does not complete, replace
the display assembly. If the
monitor is blank, replace the
motherboard.
If the power mode light and
display turn on and the BIOS
completes, but the OS will
not start from the hard disk or
from a floppy drive, replace
the motherboard. If the OS
starts only from a floppy
drive, reinstall the factory
software onto the hard drive;
replace the hard drive.
Beeps once, spins
hard disk, repeats,
but does not boot.SDRAM module. Make sure at least one
SDRAM module is installed.
Does not boot on
main battery, but
boots on AC.Check the battery level using
the battery LEDs.
Check battery contacts. If
available, try another battery.Battery or contacts.
Motherboard. 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-7
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Does not boot from
a floppy drive.Make sure the floppy disk is
bootable.
Make sure the floppy drive is
installed or connected
correctly.
If the floppy drive is
connected to a USB port,
make sure Legacy USB
Support is enabled in BIOS
Setup.
Use BIOS Setup to check the
boot order and to make sure
that floppy boot is enabled.
If the drive is installed in the
expansion base, try
connecting it to a USB port,
or vice versa.Floppy drive or
contacts.
Floppy drive cable.
Expansion base.
Motherboard.
Does not boot from
a CD or DVD in the
CD/DVD drive.Make sure the CD or DVD is
bootable.
Use BIOS Setup to check the
boot order.
Restart the computer.
Test the DVD drive with the
e-DiagTools diagnostics.CD/DVD drive
module.
Motherboard.
Expansion base.
Error message
such as “Invalid
system disk” or
“Auto IDE error”.Check for a disk in the floppy
drive.
Check the boot order in BIOS
Setup.
Remove and reinsert the
hard drive.Hard drive contacts.
Hard drive.If the unit boots from the
floppy drive, check for corrupt
files on the hard drive;
reinstall the factory software
onto the hard drive; replace
the hard drive.
Sluggish startup or
shutdown.Run ScanDisk and Disk
Defragmenter to check and
optimize the hard drive.
Delete temporary and
unneeded files.Hard drive. Use the suggestions shown
at left.
Password has been
forgotten.Verify 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. 
						

							3-8 Troubleshooting and Diagnostics HP Omnibook 500
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Power/Battery
Short battery
operating time.Turn down the display
brightness.
Check power management
settings in BIOS Setup. Try
the default settings.
Restart the computer, press
F6 when the HP logo
appears, and follow the
instructions that appear
onscreen. This process
calibrates the main battery
and any secondary battery in
the expansion base’s left
module bay, and requires
four to five hours per battery.
You cannot use the computer
during this process.
Some applications can use
excess power. (Users can
get the Intel Power Monitor
from www.intel.com and
monitor CPU load.)
PCMCIA cards can affect
battery life. Some cards 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.
Turns off
immediately after
turning on.Battery may be extremely
low. Plug in the AC adapter,
insert a charged battery (if
undocked), or plug in a
secondary battery (if
docked).Battery.
Does not run on
battery; empty
battery indication.Check the battery and
contacts. If one is available,
try another battery.Battery or contacts.
Motherboard.
Beeps repeatedly. The computer beeps
repeatedly when the battery
is low. Save your work
immediately, shut down
W indows, and insert a
charged battery or plug in the
AC adapter.Battery.
Computer stops
while swapping
main battery in
Standby mode.Disable device settings that
use extra power during
Standby (for example, turn
off W indows 2000 W ake On
LAN option).
Shut down or plug in AC
adapter before swapping.
Plug in AC adapter and allow
to stand overnight to
recharge backup battery.
Unplug any USB devices.Backup battery.