IBM pSeries 670 Service Manual page 240

Step 152i-52
Have all the cards listed in "Step 152i-45" 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 152i-49" on page 219.
Step 152i-53
Turn off the power.
Examine the green "power good out" LEDs of both I/O subsystem DCAs.
Step 152i-54
Are all the green "power good out" LEDs of both I/O subsystem DCAs off?
Yes Go to "Step 152i-55".
No Call for support.
Step 152i-55
Replace the books in the following list one at a time and in the order listed:
v DCA 1 at V1
v DCA 2 at V2
Step 152i-56
Turn on the power.
Step 152i-57
Did the system stop with the same error code as recorded in "Step 152i-1" on page 214?
Yes Go to "Step 152i-58".
No The book just replaced was defective. 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.
Step 152i-58
Turn off the power.
Make sure all the green "power good out" LEDs of both I/O subsystem DCAs are off.
Step 152i-59
Remove the new card that was just installed in "Step 152i-55" and reinstall the original card.
220 Eserver pSeries 670 Service Guide