HP Omnibook 500 Service Manual

							HP Omnibook 500 Troubleshooting and Diagnostics 3-9
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Main battery does
not charge.Check the power source.
Make sure the main battery is
installed properly.
Check the battery contacts. If
available, try another battery
and AC adapter.
Move the computer away
from any heat source. Unplug
the AC adapter and let the
battery cool down. Check for
blocked air vents.Battery or contacts.
AC adapter.
Motherboard.
Heatsink/fan.Check the main battery and
AC adapter.
Check the heatsink/fan.
Secondary battery
module does not
charge.Make sure the main battery is
fully charged. If not, the
secondary battery will not
charge.
Check the power source.
Make sure the secondary
battery is installed properly.Secondary battery
module.
Expansion base.Check the secondary battery
and AC adapter.
Time Remaining
indicator is
inaccurate.The Time Remaining is an
estimate based on how much
power the computer is using
at the moment. The estimate
therefore depends on the
current task, and assumes
that power will be used at the
same rate until the battery
runs out. So, for example, if
the computer is performing a
task requiring a good deal of
power (such as reading from
a CD or DVD), the value will
probably show too little time
remaining.
Display
Dark display, no
light.Adjust the display brightness.
Press Fn+F5 several times.
Try an external monitor.
If the display is extremely
cold, it will show completely
dark. If this happens, allow
the computer to gradually
warm to room temperature.Display cable
connection.
Display assembly.
Motherboard.Reprogram the EEPROM—
see page 2-20.
Check the cable connection.
Replace the display
assembly.
If an external monitor
displays no image, replace
the motherboard.
W hite display. Adjust display brightness. Display assembly.
Motherboard.
Erratic display. Display cable
connection.
Display assembly.
Motherboard.Check the display cable
connection.
Bright or missing
pixels or lines.See quality statement on
page 5-2.Display cable
connection.
Display assembly.Check the display cable
connection.
See the quality statement on
page 5-2. 
						

							3-10 Troubleshooting and Diagnostics HP Omnibook 500
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Punctured display. Declared to be caused by
customer abuse.
Vertical crack near
center of display.Usually caused by
closing display with
pencil-sized object on
keyboard.Declared to be caused by
customer abuse.
Scratched display
glass.Declared to be caused by
customer abuse.
Local area of dark
or light discoloration
visible when display
is on.Caused by excessive
pressure applied to an
area on the screen.Declared to be caused by
customer abuse.
Hard disk
Hard disk doesn’t
spin.Check the power source.
Remove and reinsert the
hard drive. Use a flashlight to
check the connector.Hard drive/LED flex
cable.
Hard drive.
Motherboard.If the drive case is damaged,
the drive may not operate
properly.
Hard disk makes
clunking or
scratching noise.Back up the drive
immediately.
W as the computer or drive
dropped?Hard drive. Check the computer and
drive for evidence of
customer abuse.
Hard disk makes
buzzing or whining
noise.Back 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
from the motherboard.Depends on the
source of the noise.
Files are corrupted. Run the VirusScan program.
Check the disk surface by
running Scandisk
(W indows 98) or using the
Tools tab in the disk’s
Properties sheet
(W indows 2000).
Test the hard disk drive with
the e-DiagTools diagnostics.
Use the 
Recovery CD to
restore the factory software.Use the suggestions shown
at left.
Drive capacity is
less than normal.Check the disk surface by
running Scandisk
(W indows 98) or using the
Tools tab in the disk’s
Properties sheet
(W indows 2000).
Check partitions using FDISK
(W indows 98) or Control
Panel, Administrative Tools,
Computer Management
under Storage
(W indows 2000).Hard drive. Use the suggestions shown
at left.
Recreate the Utility partition,
then partition and format the
disk. 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-11
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
CD-ROM/DVD drive
Cannot read a CD
or DVD.Make sure the CD/DVD is
clean and inserted properly.
Make sure the drive module
is inserted properly.
Restart the computer. Reset
the expansion base.CD/DVD drive
module.
Region Code error
when playing a
DVD.DVDs can contain embedded
regional codes that prevent
them from playing outside
the region in which they are
sold. This error indicates you
are trying to play a DVD
intended for a different
region.
General problems. Make sure the drive module
is installed or connected
correctly.
Restart the computer. Reset
the expansion base.CD/DVD drive
module.
Expansion base.
Motherboard.
Floppy drive
General problems. Make sure the drive module
is installed or connected
correctly.
If the drive is installed in the
expansion base, try
connecting it to a USB port,
or vice versa.
Check the settings in BIOS
Setup.Floppy drive module.
Floppy drive cable.
Expansion base.
Motherboard.
Keyboard and pointing stick
Some or all keys do
not work properly.Check the settings in BIOS
Setup.Keyboard.
Motherboard.Try reconnecting the
keyboard and pointing stick
flex cables.
PS/2 keyboard and
mouse do not work.Check the devices
separately.
Suspend or shut down the
computer before attaching
the device, so that it will be
detected properly.
Test the keyboard and
pointing stick with the
e-DiagTools diagnostics.PS/2 device.
Expansion base.
Motherboard.
Pointing stick
doesn’t work.Make sure the pointing stick
is enabled in BIOS Setup and
in Mouse Properties in
Control Panel.
Restart the computer.Keyboard.
Motherboard.Check the keyboard and
pointing stick flex cable
connections.
General problems. Suspend and resume
operation using the blue
sleep button.
Slide and hold the power
button four seconds to reset
the computer.Keyboard.
Motherboard.Check the keyboard and
pointing stick flex cable
connections. 
						

							3-12 Troubleshooting and Diagnostics HP Omnibook 500
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Memory
Out of memory
message appears.Delete temporary and
unneeded files on drive C.
If using third-party SDRAM
module, check HP Notebook
web site to see if the module
has been tested for use with
this computer.
Test the memory with the
e-DiagTools diagnostics.SDRAM module.
Motherboard.
Memory doesn’t
increase after
adding SDRAM.Use only PC-100 SDRAM
modules.SDRAM module.
Click/scroll button
General problems. Check the pointing stick
settings in Control Panel.
Slide and hold the power
button four seconds to reset
the computer.Top case.
Motherboard.
Audio
No sound is
audible.Increase the sound volume
(Fn+UP ARROW , volume
control, and software
controls).
Make sure sound is enabled
(audio-off button and
software controls).
Check for sound resource
conflicts in Device Manager.Top case.
Motherboard.Check operation using
headphones or external
speakers.
Sound does not
record.Check the settings in BIOS
Setup and software controls.
Test the audio with
e-DiagTools diagnostics.Top case.
Motherboard.Check operation using an
external microphone.
Feedback from
speakers.Reduce the volume.
In the Volume Control, click
Options, Properties, and
select the microphone option
for the playback settings.
Make sure the microphone is
muted.
Serial/Parallel
General problems. Check connections.
Check settings in BIOS
Setup and Control Panel.
Test ports with the
e-DiagTools diagnostics.Motherboard.
Expansion base.Use a loop-back connector
when testing the serial or
parallel port—see
page 3-21. 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-13
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
USB
General problems. Check connections.
Try one device at a time.
Check settings in BIOS
Setup and Control Panel.
Test ports with the
e-DiagTools diagnostics.
Check for latest versions of
drivers.
If the device is powered by
the USB port, try different
ports: if the device works in
all but one port, replace the
module containing that port.Motherboard.
Expansion base.Use a loop-back connector
when testing the serial or
parallel port—see
page 3-21.
Modem
General problems. Check all cables and
connections. If possible,
connect directly to a wall
jack. Check line quality.
In Control Panel, open
Modems (W indows 98) or
Phone and Modem Options
(W indows 2000). Make sure
the parity, speed, word
length, and stop bits match
on sending and receiving
modems.
Open the hardware Device
Manager. If the modem is
disabled, try to enable it. If it
has a conflict, try disabling
another device.
Use an analog telephone
line, not a digital line. In a
hotel, ask for a data line.
Try disabling error correction
and data compression.Mini-PCI card.
Mini-PCI panel.
Motherboard.
LAN/Network
General problems. Check all cables and
connections.
Try connecting a different
computer to the cable.
Check settings in BIOS
Setup and Control Panel.
Make sure the LAN cable is
Category 3, 4, or 5 for
10Base-T operation, or
Category 5 for 100Base-TX
operation. Maximum cable
length is 100 meters (330
feet).
Run the LAN diagnostic
software—click Start, Run,
then click Browse, and select
the file C:\HP\DRIVERS
\LAN\W INDIAG\SETUP.EXE.Mini-PCI card.
Mini-PCI panel.
Motherboard. 
						

							3-14 Troubleshooting and Diagnostics HP Omnibook 500
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Infrared
General problems. Check installation: when
shipped, infrared is disabled
and no drivers are installed.
(Drivers are included with
notebook.)
Check settings in BIOS
Setup.
Remove any PC Card from
notebook (possible IRQ
conflict).
For fast IrDA, check for DMA
conflict with ECP parallel
port.Motherboard.
Wireless
General problems. Check TCP/IP setup in
Control Panel. For
W indows 98: try disabling
DNS in TCP/IP setup.
Check SSID and channel
settings: click wireless link
icon in taskbar and select
Advanced Configuration.
Stop USB devices that may
perform large data transfers,
or adjust application settings
to reduce transfer rate.
Make sure wireless cable is
properly connected to
switchboard PCA, and that
switchboard PCA is installed
properly.Display assembly.
Motherboard.
Switchboard PCA. 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-15
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
PCMCIA
General problems. Restart the computer.
Remove and reinsert the PC
Card.
If the card requires an IRQ,
make sure one is available.
Check settings in Control
Panel.
Check for conflicts or refresh
the device list in Device
Manager.
Check the HP Notebook web
site for installation
instructions (page vi), and to
make sure the computer
supports the problem card.
W hen using a PC Card in a
docking system, insert or
remove the card while the
system is turned on.
Download current drivers
from the card manufacturer’s
web site.
Test the PC Card with the
e-DiagTools diagnostics.Motherboard. Using a flashlight, look for
bent pins inside the PCMCIA
socket.
AC adapter
Does not power the
computer.Try another AC adapter, if
available.AC adapter.
Motherboard.The AC adapter cannot be
repaired, and must be
replaced if defective.
Motherboard
Evidence of spilled
liquid.Declared to be caused by
customer abuse.
Bent or broken
connectors, or burnt
component.Declared to be caused by
customer abuse.
Motherboard
cracked.Declared to be caused by
customer abuse.
Miscellaneous
Clock loses time. Plug in the AC adapter for 24
hours to charge the CMOS
battery.CMOS battery.
Motherboard.Charge the CMOS battery.
Computer gets
abnormally hotAlways set the computer on a
flat surface, so that air can
flow freely around and
underneath it.
Make sure the air vents are
clear.
Games and other programs
that drive CPU usage toward
100% can contribute.Heatsink/fan. Check the heatsink/fan for
proper fan operation or
damage. 
						

							3-16 Troubleshooting and Diagnostics HP Omnibook 500
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Computer pauses
or runs sluggishly.May be normal W indows
behavior (background
processing can affect
response time).
Certain background
operations (such as
VirusScan) can affect
performance.
Press CTRL+ALT+DEL to
see if an application is not
responding.
Restart the computer.
If the hard disk has spun
down to conserve power, it
can take several seconds to
spin up (you can hear this).
You can use the BIOS Setup
utility to change the hard disk
time-out to match the
Standby time-out.
Some file browsers respond
slowly while processing
graphics or waiting for broken
network connections to time
out.
Check for overheating—see
the previous symptom.
If the computer’s hard disk
drive frequently runs (as
indicated by the hard disk
activity light) while the
computer is paused or
running slowly, consider
installing additional SDRAM.
Check the amount of
available free disk space.
Delete temporary and
unneeded files.
Run BIOS Setup and set the
Power Management Mode to
Max. Performance.
Run BIOS Setup and turn off
Intel SpeedStep Mode.Motherboard. If the computer slows after a
period of continuous activity,
see the previous symptom.
Computer is still on
but stops
responding.Press CTRL+ALT+DEL and
end any application that is
not responding.
Slide and hold the power
button four seconds to turn
off and reset the computer.
Press the system-off switch
to reset the computer. 
						

							HP Omnibook 500 Troubleshooting and Diagnostics 3-17
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Does not suspend
to Standby mode as
expected.The computer won’t suspend
if it has an active connection
to another computer.
If the computer is busy, it
normally waits to finish the
current operation before
suspending.
Does not
automatically enter
Hibernate mode as
expected.For W indows 2000, make
sure hibernate support is
enabled in Power in Control
Panel. Also, make sure the
Hibernate timeouts (Power
Schemes tab) for AC and
battery power are not set to
Never.
For W indows 98, check the
Hibernate timeout in BIOS
Setup. If the computer has
more than 512 MB of
SDRAM, the Utility partition
on the hard disk must be
expanded.
Standby option
missing from Shut
Down window.Do not allow W indows 98 to
disable APM. If it prompts
you to do so, answer No.
In System in Control Panel,
expand System Devices
(System Manager tab), and
remove Advanced Power
Management. Restart the
computer, then use Add New
Hardware in Control Panel to
install support for APM.
Restart the computer.
Plug-in Modules
General problems. Make sure module is
installed properly.
Reset computer and the
expansion base.Plug-in module or
contacts.
Motherboard.
Expansion base.Plug-in modules cannot be
repaired, and must be
exchanged. 
						

							3-18 Troubleshooting and Diagnostics HP Omnibook 500
SymptomCall Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Expansion base
Computer won’t
undock or gets
stuck.Use the emergency undock
latch.
Test the expansion base with
e-DiagTools diagnostics.Expansion base.
Port on expansion
base isn’t working.Make sure the computer is
docked properly.
Reset the computer and the
expansion base.Expansion base.
Motherboard.
Computer does not
respond to undock
switch or Eject
command.Check power sources.
Use the emergency undock
latch.
If the computer is not fully
docked, use the emergency
undock latch.
Reset the computer and the
expansion base.
Test the expansion base with
e-DiagTools diagnostics.Expansion base.
Motherboard.
Floppy drive
connected to the
parallel port doesn’t
work.Make sure there is only one
floppy drive in the system.
Use only the HP F2008A
parallel floppy cable.
If the computer is not fully
docked, use the emergency
undock latch.
For W indows 98, notify
BayManager before
connecting or disconnecting
the parallel floppy drive.Floppy drive module.
Expansion base.
General CD player
or status panel
problems.Check the power source.
Reset the expansion base.
Check the HP Notebook web
site for an expansion base
BIOS update.Expansion base.
General problems. Check power sources.
Make sure the computer is
docked properly.
Check the HP Notebook web
site for an expansion base
BIOS update.Expansion base.
Motherboard.