IBM pSeries 670 Service Manual page 232

Step 152h-44
Are all the green "power good out" LEDs of both I/O subsystem DCAs off?
Yes Go to "Step 152h-45".
No Call for support.
Step 152h-45
Replace the DCAs in the following list, one at a time and in the order listed:
v DCA 1 at V1
v DCA 2 at V2
Step 152h-46
Turn on the power.
Step 152h-47
Did the system stop with the same error code as recorded in "Step 152h-1" on page 206?
Yes Go to "Step 152h-48".
No The DCA just replaced is 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 152h-48
Turn off the power.
Make sure all the green "power good out" LEDs of both I/O subsystem DCAs are off.
Step 152h-49
Remove the new DCA that was just installed in "Step 152h-45" and reinstall the original DCA.
Step 152h-50
Have all the DCAs listed in "Step 152h-45" been replaced with new or original cards?
Yes Go to "Step 152h-51"
No Go to "Step 152h-45".
Step 152h-51
Examine the green "power good out" LEDs of both I/O subsystem DCAs.
212 Eserver pSeries 670 Service Guide