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3-6 Troubleshooting and Diagnostics HP OmniBook 2100/3000/3100
Symptom Call Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Password has been
forgotten
Verify proper ownership, then
follow the removal procedure
with the owner and log the
appropriate data—see page
5-1.
An OmniBook 3000
may have to be
shipped to an HP
service center.
The user must call Technical
Support and provide proof of
ownership. Password
removal is restricted to
certain sites. See page 5-1.
OmniBook 3000 fan
turns on, no
display, cannot
reset
Audio PCA (rev 1.0). For an OmniBook 3000 with
serial number TW745... or
lower, replace the audio PCA
if it is marked rev 1.0 on the
corner of the PCA. Also, if
the smaller of the two
connectors on the
motherboard for mounting
the audio PCA is tilted
slightly, replace the
motherboard. (Service note
3000-10.)
Power/Battery
Short battery
operating time
Turn down display
brightness.
Check power management
settings in BIOS Setup. Try
the default settings.
Inform user that certain
applications can cause
excess power usage. (User
can get power monitor from
www.intel.com and monitor
CPU load.)
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 indicator
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
vents.
Battery or contacts.
AC adapter.
Motherboard.
Fan.
Check ac adapter.
Check fan.
Secondary battery
does not work, main
battery works
Check secondary-battery
contacts.
Secondary battery does not
charge until main battery is
fully charged.
Secondary battery or
contacts.
Motherboard.
Battery indicator is
inaccurate
Completely charge and
discharge the battery 2 to 4
cycles in the unit.
Motherboard. Try cycling the battery
charge.
Display
Dark display, no
light
Adjust display brightness.
Press Fn+F5 several times.
Try external monitor.
LCD module
(backlight).
LCD cables or
connections.
Inverter PCA.
LVDS PCA.
If an external monitor
displays no image, replace
the motherboard instead.