IBM 8668 - Eserver xSeries 232, Hardware Maintenance Manual

Page: 130 / 182

Message Action
Failure reading 12C device. Check devices
on bus 1.
1. Reseat Front LED cable to J39 connector
2. Replace front LED card
3.
Replace System Board
Failure reading 12C device.
Check devices
on bus 2.
1. Reseat cable (Power Backplane to System Board-Signal) to J43
connector of system board
2.
Reseat Power backplane if one is installed
3. Reseat Power Supply
4. Replace power backplane if one is installed
5. Replace Power Supply
6. Replace system board
Failure reading 12C device. Check devices
on bus 3.
1. Reseat cable (Power backplane to System Board-Signal) to J43
connector of system board
2. Reseat cable (Power backplane to DASD backplane
3. Replace DASD backplane
4. Replace system board
Failure reading 12C device. Check devices
on bus 4.
1.
Replace system board
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 111.
2. A corrupt CMOS can cause undetermined problems.
3. A corrupt BIOS can cause undetermined problems. See “Recovering BIOS code”
on page 18.
Check the LEDs on all the power supplies, see“Power supply LED errors” on
page 112. If the LEDs indicate the power supplies are working correctly, return
here and do the following:
1. Power-off the computer.
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).
Any external devices
Surge suppressor device (on the computer)
Modem, printer, mouse, or non-IBM devices
Each adapter
Drives
Memory-Modules (Minimum requirement = 256 MB (2x128 MB DIMMs))
Note:
Minimum operating requirements are:
a.
1 Power Supply
b.
Power Backplane (If 250-watt model/upgrade)
c.
System Board
d.
1 Microprocessor and VRM
e. Processor Terminator Card
f. Memory Module (with a minimum of two 128 MB DIMMs)
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Hardware Maintenance Manual: Type 8668