IBM pSeries 690 Service Manual page 286

Step 152i-60
Have all the cards listed in "Step 152i-55" on page 265 been replaced with new or original cards?
Yes Go to "Step 152i-61".
No Go to "Step 152i-55" on page 265.
Step 152i-61
Examine the green "power good out" LEDs of both I/O subsystem DCAs.
Step 152i-62
Are all the green "power good out" LEDs of both I/O subsystem DCAs off?
Yes Go to "Step 152i-63".
No Call for support.
Step 152i-63
Replace the parts in the following list one at a time and in the order listed:
v I/O subsystem backplane at P1
v I/O subsystem backplane at P2
Step 152i-64
Turn on the power.
Step 152i-65
Did the system stop with the same error code as recorded in "Step 152i-1" on page 259?
Yes Go to "Step 152i-66".
No The card 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-66
Turn off the power.
Make sure all the green "power good out" LEDs of both I/O subsystem DCAs are off.
Step 152i-67
Have all the cards listed in "Step 152i-63" been replaced?
Yes Call for support.
No Go to "Step 152i-63".
266 Eserver pSeries 690 Service Guide