IBM 560E Hardware Maintenance Manual - Page 34

See Power Systems, Determine if the problem has changed.

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Verify that the power supply being used at the time of the failure is operating correctly. (See "Power Systems Checkout" on page 14): 1. Power off the computer. 2. Visually check them for damage. If any problems are found, replace the 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 card. h. PC cards. 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 nondefective FRU. a. System board. b. LCD assembly. c. CPU mini-cartridge. 32

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Verify that the power supply being used at the time of the
failure is operating correctly.
(See “Power Systems
Checkout” on page
14):
1.
Power off the computer.
2.
Visually check them for damage.
If any problems are
found, replace the 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 card.
h.
PC cards.
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 nondefective FRU.
a.
System board.
b.
LCD assembly.
c.
CPU mini-cartridge.
32