IBM pSeries 670 Service Manual page 190

Step 152b-27
One of the books just removed is defective.
1. Turn off the power.
2. Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152b-28
Reinsert one of the books that is pulled out and listed in "Step 152b-24" on page 169.
Step 152b-29
Turn on the power.
Step 152b-30
Did the system stop with the same error code as recorded in "Step 152b-1" on page 167?
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 152b-31".
Step 152b-31
Have all the books listed in "Step 152b-24" on page 169 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 152b-28".
Step 152b-32
Turn off the power.
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 152b-33
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152b-34".
No Call for support.
Step 152b-34
Replace the books in the following list, if present, one at a time and in the order listed:
v Primary I/O Book, at location U1.18-P1-H2
v DCA 1-RH, at location U1.18-P1-V1
v DCA 2-RH, at location U1.18-P1-V2
v DCA 3-RH, at location U1.18-P1-V4
v DCA 4-RH, at location U1.18-P1-V5
v DCA 5-RH, at location U1.18-P1-V6
v DCA 6-RH, at location U1.18-P1-V8
170 Eserver pSeries 670 Service Guide