Solving undetermined problems
If Dynamic System Analysis (DSA) cannot diagnose the failure or if the server is
inoperative, use the information in this section to solve the undetermined
problems.
About this task
If you suspect that a software problem is causing failures (continuous or
intermittent), see “Software problems” on page 155.
Corrupted data in CMOS memory or corrupted UEFI firmware can cause
undetermined problems. To reset the CMOS data, use the CMOS clear jumper (JP1)
to clear the CMOS memory and override the power-on password; see
“System-board internal connectors” on page 30 for more information. If you
suspect that the UEFI firmware is corrupted, see “Recovering the server firmware
(UEFI update failure)” on page 161.
If the power supplies are working correctly, complete the following steps:
Procedure
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 Printer, mouse, and non-IBM devices.
v Each adapter.
v Hard disk drives.
Note: The minimum configuration required for the server to start is one
microprocessor and one 2 GB DIMM.
4. Turn on the server. If the problem remains, suspect the following components
in the following order:
a. Power supply
b. Memory
c. Microprocessor
d. System board
What to do next
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 riser
card.
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.
158 System x3100 M5 Type 5457: Installation and Service Guide
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