HP OmniBook 900 Service Manual page 52

Symptom Call Center:
Suggestions
Sluggish startup or Run ScanDisk and Disk
shutdown Defragmenter to check and
optimize the hard drive.
Delete temporary and
unneeded files.
Password has been Verify proper ownership, then
forgotten follow the removal procedure
with the owner and log the
appropriate data—see page
5-1.
Power/Battery
Short battery Turn down display
operating time 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.
Does not run on Check battery contacts. If
battery, empty available, try another battery.
battery indication
Battery does not Check the power source.
charge
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 indicator is Completely charge and
inaccurate discharge the battery 2 to 4
cycles in the unit.
Display
Dark display, no Adjust display brightness.
light
Press Fn+F5 several times.
Try external monitor.
Check for very low ambient
temperature.
3-6 Troubleshooting and Diagnostics
Repair Center: Repair Center:
Likely Causes Comments
Use same suggestions
shown at left.
The user must call Technical
Support and provide proof of
ownership. Password
removal is restricted to
certain sites. See page 5-1.
Battery. Battery capacity often
decreases after a year or
Motherboard.
more.
Battery or contacts.
Motherboard.
Battery or contacts. Check ac adapter.
AC adapter. Check fan.
Motherboard.
Fan.
Battery. Try cycling the battery
charge. Press F6 during boot
Motherboard.
to cycle the battery charge.
LCD module If an external monitor
(backlight). displays no image, replace
the motherboard.
LCD flex cable, power
cable, or
connections.
Motherboard.
HP OmniBook 900