IBM 88614RX Maintenance Manual - Page 146

Undetermined problems, Minimum operating requirements are

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Undetermined problems Use the information in this section if the diagnostic tests did not diagnose the failure or if the server is inoperative. Notes: 1. If you suspect a software mismatch is causing failures (solid or intermittent), be sure to see "Error symptoms" on page 121. 2. Damaged data in CMOS memory can cause undetermined problems. 3. Damaged data in BIOS code can cause undetermined problems. See "Recovering BIOS code" on page 24. Check the LEDs on all the power supplies (see "Power LED errors" on page 130). 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 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, or non-IBM devices v Each adapter v Hard disk drives v Memory modules (minimum requirement = 1 GB (2 x 512 MB DIMMs)) v Service processor Note: Minimum operating requirements are: v 1 microprocessor v 2 x 512 MB DIMMs in memory board v 1 power supply v Power backplane v I/O board 4. Turn on the server. If the problem remains, suspect the following FRUs in the following order: a. Microprocessor-tray assembly b. I/O board c. Memory board d. Power backplane Notes: 1. If the problem is solved when you remove an adapter from the server and replacing that adapter does not correct the problem, suspect the I/O board. 2. If you suspect a networking problem and the server passes all the system tests, suspect a network cabling problem external to the server. 136 IBM xSeries 365 Types 8861, 8862: Hardware Maintenance Manual and Troubleshooting Guide

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Undetermined problems
Use the information in this section if the diagnostic tests did not diagnose the failure
or if the server is inoperative.
Notes:
1.
If you suspect a software mismatch is causing failures (solid or intermittent), be
sure to see “Error symptoms” on page 121.
2.
Damaged data in CMOS memory can cause undetermined problems.
3.
Damaged data in BIOS code can cause undetermined problems. See
“Recovering BIOS code” on page 24.
Check the LEDs on all the power supplies (see “Power LED errors” on page 130). 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
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, or non-IBM devices
v
Each adapter
v
Hard disk drives
v
Memory modules (minimum requirement = 1 GB (2 x 512 MB DIMMs))
v
Service processor
Note:
Minimum operating requirements are:
v
1 microprocessor
v
2 x 512 MB DIMMs in memory board
v
1 power supply
v
Power backplane
v
I/O board
4.
Turn on the server. If the problem remains, suspect the following FRUs in the
following order:
a.
Microprocessor-tray assembly
b.
I/O board
c.
Memory board
d.
Power backplane
Notes:
1.
If the problem is solved when you remove an adapter from the server and
replacing that adapter does not correct the problem, suspect the I/O board.
2.
If you suspect a networking problem and the server passes all the system
tests, suspect a network cabling problem external to the server.
136
IBM xSeries 365 Types 8861, 8862: Hardware Maintenance Manual and Troubleshooting Guide