IBM pSeries 690 Service Manual page 325

Step 1541-36
Have all the books listed in "Step 1541-33" on page 304 been replaced?
Yes Go to "Step 1541-37".
No Go to "Step 1541-31" on page 304.
Step 1541-37
Turn off the power.
Step 1541-38
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 1541-39
Are all the amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 1541-40".
No Call for support.
Step 1541-40
Attention: Before replacing the system backplane, call for support.
Replace the system backplane at U1.18-P1.
Step 1541-41
Turn on the power.
Step 1541-42
Did the system stop with the same error code as recorded in "Step 1541-1" on page 299?
Yes Go to "Step 1541-43".
No The book 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 1541-43
Turn off the power.
Make sure the amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 1541-44
Call for support.
This ends the procedure.
Chapter 3. Maintenance Analysis Procedures
305