HP OmniBook 900 Service Manual

3-6 Troubleshooting and Diagnostics HP OmniBook 900
Symptom Call Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Sluggish startup or
shutdown
Run ScanDisk and Disk
Defragmenter to check and
optimize the hard drive.
Delete temporary and
unneeded files.
Use same 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.
Power/Battery
Short battery
operating time
Turn down display
brightness.
Check power management
settings in BIOS Setup. Try
the default settings.
Shut down and restart.
During boot at the F2 prompt,
press F6. This starts a
process that recalibrates the
battery gauge, possibly
improving operating time.
Inform user that certain
applications can cause
excess power usage. (User
can get power monitor from
www.intel.com and monitor
CPU load.)
Some PC cards (PCMCIA)
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.
Does not run on
battery, empty
battery indication
Check battery contacts. If
available, try another battery.
Battery or contacts.
Motherboard.
Battery does not
charge
Check the power source.
Check battery contacts. If
available, try another battery
and ac adapter.
Check for high ambient
temperature and blocked air
holes on the side and
bottom. Do not charge in a
small space or on a soft
surface.
Battery or contacts.
AC adapter.
Motherboard.
Fan.
Check ac adapter.
Check fan.
Battery indicator is
inaccurate
Completely charge and
discharge the battery 2 to 4
cycles in the unit.
Battery.
Motherboard.
Try cycling the battery
charge. Press F6 during boot
to cycle the battery charge.
Display
Dark display, no
light
Adjust display brightness.
Press Fn+F5 several times.
Try external monitor.
Check for very low ambient
temperature.
LCD module
(backlight).
LCD flex cable, power
cable, or
connections.
Motherboard.
If an external monitor
displays no image, replace
the motherboard.

HP OmniBook 900 Specifications

General

Brand	HP
Model	OmniBook 900
Category	Laptop
Language	English