IBM ThinkPad 240X, Руководство по техническому обслуживанию аппаратной части

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Undetermined Problems
You are here because the diagnostic tests did not identify
which adapter or device failed, which installed devices are
incorrect, whether a short circuit is suspected, or whether
the system is inoperative. Follow these procedures to
isolate the failing FRU (do not isolate non-defective FRUs).
Verify that the power supply being used at the time of the
failure is operating correctly. (See “Power System
Checkout” on page 27.)
1. Power off the computer.
2. Visually check for damage. If any problems are found,
replace the FRU.
3. Remove or disconnect all of the following devices:
a. Non-IBM devices
b. Printer, mouse, and other external devices
c. Battery ASM
d. Hard disk drive
e. DIMM
f. PC Cards (PCMCIA)
4. Power on the computer.
5. Determine if 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 non-defective FRU.
a. System board
b. LCD panel ASM
General Description
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