IBM pSeries 690 Service Manual page 261

Step 152f-23
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152f-24".
No Call for support.
Step 152f-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
Step 152f-25
Turn on the power.
Step 152f-26
Did the system stop with the same error code as recorded in "Step 152f-1" on page 238?
Yes Go to "Step 152f-32" on page 242.
No Go to "Step 152f-27".
Step 152f-27
The book just removed is defective.
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152f-28
Reinsert the book that is pulled out and listed in "Step 152f-24".
Step 152f-29
Turn on the power.
Step 152f-30
Did the system stop with the same error code as recorded in "Step 152f-1" on page 238?
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 152f-31" on page 242.
Chapter 3. Maintenance Analysis Procedures
241