IBM xSeries 100, Руководство по диагностике и обслуживанию

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Solving undetermined problems
If the diagnostic tests did not diagnose the failure or if the server is inoperative, use
the information in this section.
If you suspect that a software problem is causing failures (continuous or
intermittent), see “Software problems” on page 35.
Damaged data in CMOS memory or damaged BIOS code can cause undetermined
problems. To reset the CMOS data, use the clear CMOS jumper (JP2) to clear the
CMOS memory; see “System-board jumpers” on page 11. If you suspect that the
BIOS code is damaged, see “Recovering from a BIOS update failure” on page 44.
Check the LEDs on the power supply. If the LEDs indicate that the power supply is
working correctly, complete the following steps:
1. Turn off the server.
2. Make sure that the server is cabled correctly.
3. Remove or disconnect the following devices, one at a time, until you find the
failure. Turn on the server and reconfigure it each time.
v Any external devices.
v Surge-suppressor device (on the server).
v Modem, printer, mouse, and non-IBM devices.
v Each adapter.
v Hard disk drives.
v Memory modules. The minimum configuration requirement is one 256 MB
DIMM.
The following minimum configuration is required for the server to turn on:
v
A microprocessor
v
One 256 MB DIMM on the system board
v
A power supply
v
Power cord
v
System board
4. Turn on the server. If the problem remains, suspect the following components in
the following order:
a. System board
b. Memory module
c. Microprocessor
If the problem is solved when you remove an adapter from the server but the
problem recurs when you reinstall the same adapter, suspect the adapter; if the
problem recurs when you replace the adapter with a different one, suspect the
system board.
If you suspect a networking problem and the server passes all the system tests,
suspect a network cabling problem that is external to the server.
Chapter 2. Diagnostics
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