Lenovo TD100X manual Solving undetermined problems

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 184.

Damaged data in CMOS memory or damaged BIOS code can cause undetermined problems. To reset the CMOS data, use the clear CMOS switch to clear the CMOS memory; see “System-board switches” on page 14. If you suspect that the BIOS code is damaged, see “Recovering from a BIOS update failure” on page 203.

Check the LEDs on all the power supplies. If the LEDs indicate that the power supplies are 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.

vSurge-suppressor device (on the server).

vModem, printer, mouse, and non-Lenovo devices.

vEach adapter.

vHard disk drives.

vMemory modules. The minimum configuration requirement is two 512 MB DIMM on the system board.

vService processor.

The following minimum configuration is required for the server to start:

vOne microprocessor

vTwo 512 MB DIMM on the system board

vOne power supply

vPower cord

vPower backplane

vServeRAID SAS adapter

vSystem board

4.Turn on the server. If the problem remains, suspect the following components in the following order:

a.Memory module

b.Microprocessor

c.Power backplane

d.System board

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 5. Diagnostics 215