Table 3-1. Troubleshooting Suggestions - HP OmniBook 3000 Service Manual

• Consider Causes. Keep in mind possible causes for each problem, such as the ones listed in the
tables below. Use the diagnostic tools to help find possible causes and repair the problem.
The first table below lists general guidelines for repairing units with certain failure symptoms. The
suggested order of investigation is not mandatory. The second table (page 3-8) shows how you can
use the different diagnostic tools to isolate the cause.
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.
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 1-10.
Startup
Does not boot on Check the power source.
ac or battery, no
Push system-off button.
display
Remove any RAM boards
and try again. Reinsert and
try again.
Does not boot on Check battery level on status
battery (boots on panel and battery LEDs.
ac)
Check battery contacts. If
available, try another battery.
Does not boot from Check floppy drive contacts.
floppy drive
Try using alternate
connection (with or without
floppy cable).
Check boot order in BIOS
Setup.
Error message Remove and reinsert hard
such as "Invalid drive.
system disk" or
"Auto IDE error."
Sluggish startup or Run ScanDisk and Disk
shutdown. Defragmenter to check and
optimize the hard drive.
Delete temporary and
unneeded files.
Password has been The unit may have to be
forgotten shipped to an HP service
center.
HP OmniBook 3000

Table 3-1. Troubleshooting Suggestions

Repair Center:
Likely Causes
AC adapter
(F1377-60901).
RAM board (varies).
Hard drive (varies).
CPU module (varies).
Motherboard
(F1391-60901).
Battery or contacts
(F1382-60901).
Motherboard
(F1391-60901).
Floppy drive or
contacts
(F1384-60901).
Floppy cable
(F1380-60901).
Motherboard
(F1391-60901).
Hard drive contacts.
Hard drive (varies).
The unit may have to
be shipped to an
HP service center.
Repair Center:
Comments
Check ac adapter.
Remove any RAM boards
and retry.
If unit boots from floppy
drive, reprogram BIOS,
reload hard drive, replace
hard drive. Otherwise,
replace CPU module, then
motherboard.
If unit boots from floppy
drive, check for corrupt files
on hard drive, reload hard
drive, replace hard drive.
Use same suggestions
shown at left.
Password removal is
restricted to certain sites.
See page 5-1.
Troubleshooting and Diagnostics 3-3