IBM XSERIES 255 TYPE 8685, Руководство по техническому обслуживанию и ремонту

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Note: See “System” on page 160 to determine which components should be replaced by a field service technician.
Bus fault messages Message Action
Failure reading I2C device.
Check devices on bus 2.
1. Reseat the cable between the system board and the power
supply (power backplane) (J40).
2. Power backplane.
3. Power supply.
4. System board.
Failure reading I2C device.
Check devices on bus 3.
1. Reseat the cable between the DASD backplane and connector
(J15) of system board.
2. DASD backplane.
3. System board.
Failure reading I2C device.
Check device on bus 4.
v
System board
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
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 = 256 MB (2 banks of 128 MB
DIMMs))
Note: Minimum operating requirements are:
a. One power supply
b. Power backplane
c. System board
d. One microprocessor and VRM
e. Memory module (with a minimum of two 128 MB DIMMs)
4. Turn on the server. If the problem remains, suspect the following FRUs in the
order listed:
v
Power supply
v
Power backplane
v
System 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 system board.
Chapter 6. Symptom-to-FRU index
157