Power-Related Symptoms
Symptom / Error FRU / Action in Sequence
Power shuts down during
operation.
1. Go to “Power
Systems Checkout”
on page 533.
2. Battery pack
3. Remove the battery
pack and let it cool for
2 hours.
4. DC/DC card
5. Power sources
The system does not power
off.
(See “Reset Switch” on
page 527.)
1. Press the power
shutdown switch.
2. System board
Other Symptoms
Note: If you cannot find a symptom or error in this list
and the problem persists, see “Undetermined
Problems” on page 561.
Symptom / Error FRU / Action in Sequence
Errors occur only when the
port replicator is used.
See “Port Replicator
Checkout” on page 36.
Intermittent Symptoms
Intermittent system hang problems can be caused by a
variety of reasons that have nothing to do with a hardware
defect, such as: cosmic radiation, electrostatic discharge,
or software errors. FRU replacement should be
considered only when a recurring problem exists.
When analyzing the intermittent problem, do the following:
1. Run the advanced diagnostic test for the system
board in loop mode at least 10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU shown by
the FRU code. Rerun the test to verify that no more
errors exist.
560 IBM Mobile Systems HMM
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