Troubleshooting Tips; Table 14 - Omnibook Troubleshooting Tips - HP OMNIBOOK 5500 Service Manual

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
Battery
Won't run on
battery — no bars
in battery icon
Battery won't
charge — light
blinks
Battery won't
charge — no
charge indicators
Hard Disk Drive
HDD doesn't spin
at all
Display
Dark display — no
light
Video problems —
appears horizontal
hold is out
Call Center
Try known good
battery in suspect unit
Try suspect battery in
known good unit
Send in for repair
Try known good
battery
Send in for repair
Try known good
battery in suspect unit
Try suspect battery in
known good unit
Send in for repair
Verify known good
power source
Reseat HDD
Send in for repair
Ensure
contrast/brightness
button is installed
properly
Adjust
contrast/brightness
Send in for repair
Send in for repair
Likely Cause Comments
(in order)
Battery
PT-586
Battery
PT-586 Possible solder problem
on RT1
PT-586 If the HDD plastic kit is
bent or otherwise
HDD
misshapen, the HDD may
HDD flex
not function properly.
cable
HDD plastic kit
Broken Replace display
backlight tube
Display Lift up icon assy — push
connector not down on left display
seated connector.
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