Table 3-2. Troubleshooting Suggestions - HP OmniBook 900 Service Manual

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.
Symptom Call Center:
Suggestions
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 1-14.
Startup
Does not boot on Check the power source.
ac or battery
Push system-off button.
Unplug the ac adapter and
remove battery, then
reconnect power.
Remove any RAM board and
try again. Reinsert and try
again.
Does not boot on Check battery level on
battery (boots on battery LEDs.
ac)
Check battery contacts. If
available, try another battery.
Does not boot from Check floppy drive contacts.
floppy drive
Try reseating the external
module bay cable and the
module into the bay.
Try using alternate
connection (with accessory
floppy cable or external
module bay).
Check boot order in BIOS
Setup.
Check that floppy boot is
enabled in BIOS Setup.
Error message Check for a disk in floppy
such as "Invalid drive.
system disk" or
Remove and reinsert hard
"Auto IDE error"
drive.
Check boot order in BIOS
Setup.
HP OmniBook 900

Table 3-2. Troubleshooting Suggestions

Repair Center:
Likely Causes
AC adapter.
RAM board.
CPU module.
Motherboard.
BIOS IC.
LCD module.
Hard drive.
Battery or contacts.
Motherboard.
Floppy drive or
contacts.
Accessory floppy
cable.
External module bay.
Motherboard.
Hard drive contacts.
Hard drive.
Repair Center:
Comments
Check ac adapter. Remove
any RAM boards and retry.
If power status light does not
turn on, reprogram or replace
BIOS IC, 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
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.
If unit boots from floppy drive,
check for corrupt files on
hard drive, reload hard drive,
replace hard drive.
Troubleshooting and Diagnostics 3-5