IBM pSeries 690 Service Manual page 364

Step 1546-6
Did the system stop with the same error code as recorded in "Step 1546-1" on page 347?
Yes Go to "Step 1546-7."
No The book or 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.
Step 1546-7
Have all the books or modules listed in "Step 1546-4" on page 347 been replaced?
Yes Go to "Step 1546-8."
No Go to "Step 1546-2" on page 347.
Step 1546-8
Turn off the power.
Step 1546-9
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 1546-10
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 1546-11."
No Call for support.
Step 1546-11
Attention: Before replacing the system backplane, call for support.
Replace the system backplane at U1.18-P1.
Step 1546-12
Turn on the power.
Step 1546-13
Did the system stop with the same error code as recorded in "Step 1546-1" on page 347?
Yes Go to "Step 1546-14."
No The part 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.
Step 1546-14
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
348 Eserver pSeries 690 Service Guide