Undetermined Problems - IBM 8649 - Eserver xSeries 225 Maintenance And Troubleshooting Manual

Note: See "System replaceable units" on page 122 to determine which components should be replaced by a field
service technician.
Bus fault messages
Failure reading 12C device.
Check devices on bus 1.
Failure reading 12C device.
Check devices on bus 2.
Failure reading 12C device.
Check devices on bus 3.
Failure reading I2C device.
Check device on bus 4.

Undetermined problems

Use the information in this section if the diagnostic tests did not identify the failure,
the devices list is incorrect, or the system is inoperative.
Notes:
1. Damaged data in CMOS can cause undetermined problems.
2. Damaged data in BIOS code can cause undetermined problems.
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. Be sure 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
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IBM xSeries 225 Types 8649: Hardware Maintenance Manual and Troubleshooting Guide
Message Action
1. Reseat the I2C cable between the operator information panel and
system board (J22).
2. Operator information panel.
3. System board.
1. Reseat the cable between system board and the power supply
(power cage assembly, if installed) (J10).
2. Power cage assembly, if installed.
3. Power supply.
4. System board.
1. Reseat the cable between the DASD backplane and connector
(J10) of system board.
2. DASD backplane.
3. System board.
System board
failure (turn on the server and reconfigure each time):
Any external devices
Surge suppressor device (on the server)
Modem, printer, mouse, or non-IBM devices
Each adapter
Drives
Memory modules (minimum requirement = 256 MB (2 banks of 128 MB
DIMMs))
Note: Minimum operating requirements are:
a. One power supply
b. Power cage assembly, if installed.
c. System board
d. One microprocessor and VRM
e. Memory module (with a minimum of two 128 MB DIMMs)
order listed:
Power supply
Power cage assembly, if installed