Undetermined Problems - IBM 8836 - Eserver xSeries 306 Maintenance And Troubleshooting Manual

Undetermined problems

Use the information in this section if the diagnostic tests did not diagnose the
failure, the devices list is incorrect, or the server is inoperative.
Damaged data in CMOS memory or damaged BIOS code can cause undetermined
problems. To reset the CMOS data, use the CMOS recovery jumper to override the
power-on password and clear the CMOS memory; see "Erasing a lost or forgotten
password (clearing CMOS memory)" on page 25. If you suspect that the BIOS code
is damaged, see "Updating BIOS code" on page 23.
Check the LEDs on all the power supplies. If the LEDs indicate 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
4. Turn on the server. If the problem remains, suspect the following FRUs in the
Notes:
1. If the problem goes away when you remove an adapter from the system and
2. If you suspect a networking problem and all the system tests pass, suspect a
failure (turn on the server and reconfigure each time):
v Any external devices
v Surge suppressor device (on the server)
v Modem, printer, mouse, or non-IBM devices
v Each adapter
v Drives
v Memory modules (minimum requirement = two 512 MB DIMMs)
Note: Minimum operating requirements are:
a. Power supply
b. System board
c. One microprocessor
d. Memory (with a minimum of two 512 MB DIMMs)
order listed:
v Power supply
v System board
replacing that adapter does not correct the problem, suspect the system board.
network cabling problem external to the system.
Chapter 6. Symptom-to-FRU index
73