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Troubleshooting Tips
Presented below is a table showing general guidelines for repairing units with specific failure
symptoms. The order of likely causes is based upon data gathered by HP from analysis of failed
modules. The suggested order of investigation is not mandatory but reflects the priority HP
would currently place on looking for the root cause.
Swapping of easily replaced modules with known good reference modules is the ideal way to
isolate the cause down to the module level. It is rare for more than one module to be
responsible for the same failure symptom. Therefore, replacement of more than one module for
a particular symptom should be the exception rather than the normal expectation.
After replacing modules, it is normal for some units to end up in a confused state and lock up
when ac power is applied. If this occurs, the reset button should be pressed to bring the
computer to a known state. If the unit still locks up or continues to lock up each time ac power is
applied, the unit needs additional analysis.
Table 14 - OmniBook Troubleshooting Tips
Symptom Call Center Likely Cause
(in order)
Comments
Battery
Won’t run on
battery — no bars
in battery icon
• Try known good
battery in suspect unit
• Try suspect battery in
known good unit
• Send in for repair
• Battery
• PT-586
Battery won’t
charge — light
blinks
• Try known good
battery
• Send in for repair
• Battery
Battery won’t
charge — no
charge indicators
• Try known good
battery in suspect unit
• Try suspect battery in
known good unit
• Send in for repair
• PT-586 • Possible solder problem
on RT1
Hard Disk Drive
HDD doesn’t spin
at all
• Verify known good
power source
• Reseat HDD
• Send in for repair
• PT-586
• HDD
• HDD flex
cable
• HDD plastic kit
• If the HDD plastic kit is
bent or otherwise
misshapen, the HDD may
not function properly.
Display
Dark display — no
light
• Ensure
contrast/brightness
button is installed
properly
• Adjust
contrast/brightness
• Send in for repair
• Broken
backlight tube
• Replace display
Video problems —
appears horizontal
hold is out
• Send in for repair • Display
connector not
seated
• Lift up icon assy — push
down on left display
connector.