IBM pSeries 690 Service Manual page 252

Step 152d-49
Have all the modules listed in "Step 152d-42" on page 231 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 231.
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 225?
Yes Go to "Step 152d-55".
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.
Step 152d-55
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152d-56
Has the system backplane been replaced?
Yes Call for support.
No Go to "Step 152d-52".
232 Eserver pSeries 690 Service Guide