Undetermined problems
You are here because the diagnostic tests did not identify
which adapter or device failed, wrong devices are installed,
a short circuit is suspected, or the system is inoperative.
Follow these procedures to isolate the failing FRU (do not
isolate FRUs that have no defects).
Verify that all attached devices are supported by the
computer.
Verify that the power supply being used at the time of the
failure is operating correctly. (See “Power system
checkout” on page 35.)
1. Power off the computer.
2. Visually check each FRU for damage. Replace any
damaged FRU.
3. Remove or disconnect all of the following devices:
a. Non-IBM devices
b. Devices attached to the port replicator
c. Printer, mouse, and other external devices
d. Battery pack
e. Hard-disk drive
f. External diskette drive
g. DIMM
h. Ultrabay 2000 device
i. PC Cards
4. Power on the computer.
5. Determine whether the problem has changed.
6. If the problem does not recur, reconnect the removed
devices one at a time until you find the failing FRU.
7. If the problem remains, replace the following FRUs one
at a time (do not replace a nondefective FRU):
a. System board
b. LCD assembly
Symptom-to-FRU index
ThinkPad A22m wireless models
53
Summary of Contents for ThinkPad A22m 2628
Page 26: ...Laser compliance statement 22 ThinkPad A22m wireless models...
Page 71: ...3 Removing and replacing a FRU ThinkPad A22m wireless models 67...
Page 74: ...2 2 3 4 5 continued Removing and replacing a FRU 70 ThinkPad A22m wireless models...
Page 101: ...3 3 4 3 3 Removing and replacing a FRU ThinkPad A22m wireless models 97...
Page 140: ...Part Number 24P2911 1P P N 24P2911...
