Lenovo ThinkPad 560E ThinkPad 560X Hardware Maintenance Manual (Oct 1997) - Page 55

Power-Related Symptoms, Other Symptoms, Intermittent Problems

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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 Symptom / Error Errors occur only when the port replicator is used. PC Card slot pin is damaged. FRU / Action in Sequence See "Port Replicator Checkout" on page 29. PC Card slot assembly. Note: If you cannot find a symptom or an error in this list and the problem remains, see "Undetermined Problems" on page 46. 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) 45

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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)
45