Lenovo 28479WU Hardware Maintenance Manual - Page 53
If the problem remains, replace the following FRUs one at a time do not replace a nondefective FRU
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g. Optical disk or diskette in the internal drive 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 Chapter 4. Related service information 47
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g. Optical disk or diskette in the internal drive
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
Chapter 4
.
Related service information
47