IBM 2640-60x, Hardware Maintenance Manual

Page: 55 / 110

Power-Related Symptoms
Symptom / Error FRU / Action in Sequence
Power shuts down during
operation. 1. Go to “Power
Systems Checkout”
on page 30.
2. Battery pack.
3. Remove the battery
pack and let it cool for
2 hours.
4. DC/DC card.
5. System bard.
6. Check the power
outlet.
The system does not power
off.
(See “Power Shutdown
Switch” on page 25.) 1. Press the power
shutdown switch.
2. DC/DC card.
3. System board.
Other Symptoms
Note: If you cannot find a symptom or an error in this list
and the problem remains, see “Undetermined
Problems” on page 46.
Symptom / Error FRU / Action in Sequence
Errors occur only when the
port replicator is used. See “Port Replicator
Checkout” on page 29.
PC Card slot pin is
damaged. PC Card slot assembly.
Intermittent Problems
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.
ThinkPad 560X (2640-60x, 70x)
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