IBM xSeries 440 8687, Hardware Maintenance Manual

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Undetermined problems
You are here because the diagnostic tests did not identify the failure, the Devices
List is incorrect, or the system is inoperative.
Notes:
1. If you suspect a software mismatch is causing failures (solid or intermittent), be
sure to see “Error symptoms” on page 174.
2. A corrupt CMOS can cause undetermined problems.
3. A corrupt BIOS can cause undetermined problems. See “Recovering BIOS
code” on page 66.
Check the LEDs on all the power supplies (see “Power supply LED errors” on page
180). If the LEDs indicate the power supplies are working correctly, return here and
do the following:
1. Power-off the server.
2. Be sure the system is cabled correctly.
3. Remove or disconnect the following (one at a time) until you find the failure
(power-on the computer and reconfigure each time).
Note: For 16-way configuration (models 1VX, 2VX, 3VX only), turn on each
chassis as a standalone (see “Starting the diagnostic programs” on page
59).
v Any external devices
v Surge suppressor device (on the computer)
v Modem, printer, mouse, or non-IBM devices
v Each adapter
v Hard disk drives
v Memory modules (minimum requirement = 1 GB (4 x 512 MB DIMMs))
Note: Minimum operating requirements are:
a. 1 microprocessor with VRM
b. 4 x 512 MB DIMMs
c. 1 power supply
d. Top power board
e. 1 SMP board
f. Centerplane
g. I/O board
h. PCI-X board
4. Power-on the computer. If the problem remains, suspect the following FRUs in
the order listed:
Note: For 16-way configuration (models 1VX, 2VX, 3VX only), turn on each
chassis as a standalone (see “Starting the diagnostic programs” on page
59).
v Power supply
v Top power board
v SMP board
v Centerplane
v PCI-X board
v I/O board
Notes:
1. If the problem goes away when you remove an adapter from the system, and
replacing that adapter does not correct the problem, suspect the PCI-X board.
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xSeries 440 Type 8687: Hardware Maintenance Manual