IBM pSeries 670 Service Manual page 223

Step 152g-23
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152g-24".
No Call for support.
Step 152g-24
Pull out the following books about 25 mm (1 inch), if present:
v Fourth I/O book, at location U1.18-P1-H1
v Secondary I/O book, at location U1.18-P1-H3
v Third I/O book, at location U1.18-P1-H4
v Cap card at U1.18-P1-V3
v Cap card at U1.18-P1-V7
Step 152g-25
Turn on the power.
Step 152g-26
Did the system stop with the same error code as recorded in "Step 152g-1" on page 200?
Yes Go to "Step 152g-32" on page 204.
No Go to "Step 152g-27".
Step 152g-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 152g-28
Reinsert one of the books that is pulled out and listed in "Step 152g-24".
Step 152g-29
Turn on the power.
Step 152g-30
Did the system stop with the same error code as recorded in "Step 152g-1" on page 200?
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 152g-31" on page 204.
Chapter 3. Maintenance Analysis Procedures
203