IBM pSeries 690 Service Manual page 240

Step 152c-20
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-21".
Step 152c-21
Have all the books listed in "Step 152c-14" on page 219 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-18" on page 219.
Step 152c-22
Turn off the power.
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 152c-23
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152c-24".
No Call for support.
Step 152c-24
Pull out the following books about 25 mm (1 inch), if present:
v Secondary I/O book, at location U1.18-P1-H3
v Third I/O book, at location U1.18-P1-H4
v Fourth I/O book, at location U1.18-P1-H1
v Capacitor book, at location U1.18-P1-V3
v Capacitor book, at location U1.18-P1-V7
Step 152c-25
Turn on the power.
Step 152c-26
Did the system stop with the same error code as recorded in "Step 152c-1" on page 218?
Yes Go to "Step 152c-32" on page 221.
No Go to "Step 152c-27" on page 221.
220 Eserver pSeries 690 Service Guide