IBM pSeries 690 Service Manual page 256

Step 152d-48
Did the system stop with the same error code as recorded in "Step 152d-1" on page 233?
Yes The module just replaced was defective. This ends the procedure.
Return the system to its original configuration.
Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver pSeries Diagnostic Information
for Multiple Bus Systems.
No Go to "Step 152d-49."
Step 152d-49
Have all the modules listed in "Step 152d-42" on page 239 been reinstalled?
Yes The symptom has changed. This ends the procedure.
Return the system to its original configuration.
Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver pSeries Diagnostic Information
for Multiple Bus Systems.
No Go to "Step 152d-45" on page 239.
Step 152d-50
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 152d-51
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152d-52."
No Call for support.
Step 152d-52
Attention: Before replacing the system backplane, call for support.
Replace the system backplane, at location U1.18-P1.
Step 152d-53
Turn on the power.
Step 152d-54
Did the system stop with the same error code as recorded in "Step 152d-1" on page 233?
Yes Go to "Step 152d-55" on page 241.
No The system backplane was defective. This ends the procedure.
Return the system to its original configuration.
Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver pSeries Diagnostic Information
for Multiple Bus Systems.
240 Eserver pSeries 690 Service Guide