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If you suspect that a software problem is causing failures (continuous or
intermittent), see "Software problems" on page 38.
Damaged data in CMOS memory or damaged server firmware can cause
undetermined problems. To reset the CMOS memory, use the clear CMOS jumper
to override the power-on password and clear the CMOS memory; see
"System-board jumpers" on page 12 and "Clearing CMOS memory" on page 77 for
further information. If you suspect that the server firmware is damaged, see
"Updating (flash-updating) the server firmware" on page 77 and"Starting the backup
server firmware" on page 219 for further information.
Make sure that the power supply is working correctly. If the power supply is working
correctly and reseating the system-board tray in the chassis does not correct the
problem, complete the following steps:
1. Turn off the system-board tray.
2. Remove the system-board tray from the chassis.
3. If an expansion enclosure is installed, remove it (see "Removing an expansion
enclosure from a system-board tray" on page 131); otherwise, remove the
system-board tray cover (see "Removing the system-board tray cover" on page
125).
4. Remove or disconnect the following devices, one at a time, until you find the
failure. Reinstall, turn on, and reconfigure the system-board tray each time.
v Any external devices.
v Each adapter.
v Each hard disk drive.
v Memory modules. The minimum configuration requirement is one 1 GB DIMM
in connector 3 (see "System-board connectors" on page 11 for the location of
the DIMM connectors).
The following minimum configuration is required for the system-board tray to
start:
v One chassis
v One microprocessor installed in microprocessor connector 1 (see
"System-board connectors" on page 11 for the location of the microprocessor
connectors)
v One DIMM in DIMM connector 3 (see "System-board connectors" on page 11
for the location of the DIMM connectors)
v One system-board tray
v One power supply
v One fan assembly
5. Install and turn on the system-board tray. If the problem remains, suspect the
following components in the following order:
a. DIMM
b. System-board tray
c. Microprocessor
If the problem is solved when you remove an adapter 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 tray.
If you suspect a networking problem and the system-board tray passes all the
system tests, suspect a network cabling problem that is external to the system.
107
Chapter 3. Diagnostics
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