Lenovo ThinkPad X220 Hardware Maintenance Manual - Page 58

Determine whether the problem has been solved., Turn on the computer.

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3. Remove or disconnect all of the following devices: a. Non-ThinkPad devices b. Devices attached to the docking station or the port replicator c. Printer, mouse, and other external devices d. Battery pack e. Hard disk drive f. External diskette drive or optical drive g. DIMM h. PC Cards 4. Turn on the computer. 5. Determine whether the problem has been solved. 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 52 Hardware Maintenance Manual

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3. Remove or disconnect all of the following devices:
a.
Non-ThinkPad devices
b. Devices attached to the docking station or the port replicator
c.
Printer, mouse, and other external devices
d. Battery pack
e.
Hard disk drive
f.
External diskette drive or optical drive
g. DIMM
h.
PC Cards
4. Turn on the computer.
5. Determine whether the problem has been solved.
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
52
Hardware Maintenance Manual