IBM pSeries 690 Service Manual page 270

Step 152g-38
Remove the new book that was just installed in "Step 152g-34" on page 249 and reinstall the original book.
Step 152g-39
Have all the books listed in "Step 152g-34" on page 249 been replaced with new or original books?
Yes Go to "Step 152g-40".
No Go to "Step 152g-34" on page 249.
Step 152g-40
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 152g-41
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152g-42".
No Call for support.
Step 152g-42
Attention: Before replacing the system backplane, call for support.
Replace the system backplane, at location U1.18-P1.
Step 152g-43
Turn on the power.
Step 152g-44
Did the system stop with the same error code as recorded in "Step 152g-1" on page 245?
Yes Go to "Step 152g-45".
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 152g-45
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152g-46
Has the system backplane been replaced?
Yes Call for support.
No Go to "Step 152g-42".
250 Eserver pSeries 690 Service Guide