IBM pSeries 690 Service Manual page 241

Step 152c-27
One of the books just removed is defective.
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152c-28
Reinsert one of the books that is pulled out and listed in "Step 152c-24" on page 220.
Step 152c-29
Turn on the power.
Step 152c-30
Did the system stop with the same error code as recorded in "Step 152c-1" on page 218?
Yes The book just reinserted is defective. Replace it. 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 152c-31".
Step 152c-31
Have all the books listed in "Step 152c-24" on page 220 been reinserted?
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 152c-28".
Step 152c-32
Turn off the power.
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 152c-33
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152c-34" on page 222.
No Call for support.
Chapter 3. Maintenance Analysis Procedures
221