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HP Omnibook 500 Troubleshooting and Diagnostics 3-9
Symptom Call Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Main battery does
not charge.
Check the power source.
Make sure the main battery is
installed properly.
Check the battery contacts. If
available, try another battery
and AC adapter.
Move the computer away
from any heat source. Unplug
the AC adapter and let the
battery cool down. Check for
blocked air vents.
Battery or contacts.
AC adapter.
Motherboard.
Heatsink/fan.
Check the main battery and
AC adapter.
Check the heatsink/fan.
Secondary battery
module does not
charge.
Make sure the main battery is
fully charged. If not, the
secondary battery will not
charge.
Check the power source.
Make sure the secondary
battery is installed properly.
Secondary battery
module.
Expansion base.
Check the secondary battery
and AC adapter.
Time Remaining
indicator is
inaccurate.
The Time Remaining is an
estimate based on how much
power the computer is using
at the moment. The estimate
therefore depends on the
current task, and assumes
that power will be used at the
same rate until the battery
runs out. So, for example, if
the computer is performing a
task requiring a good deal of
power (such as reading from
a CD or DVD), the value will
probably show too little time
remaining.
Display
Dark display, no
light.
Adjust the display brightness.
Press Fn+F5 several times.
Try an external monitor.
If the display is extremely
cold, it will show completely
dark. If this happens, allow
the computer to gradually
warm to room temperature.
Display cable
connection.
Display assembly.
Motherboard.
Reprogram the EEPROM—
see page 2-20.
Check the cable connection.
Replace the display
assembly.
If an external monitor
displays no image, replace
the motherboard.
White display. Adjust display brightness. Display assembly.
Motherboard.
Erratic display. Display cable
connection.
Display assembly.
Motherboard.
Check the display cable
connection.
Bright or missing
pixels or lines.
See quality statement on
page 5-2.
Display cable
connection.
Display assembly.
Check the display cable
connection.
See the quality statement on
page 5-2.