IBM pSeries 670 Service Manual page 320

Step 1549-42
Did the system stop with the same error code as recorded in "Step 1549-1" on page 293?
No The part 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.
Yes Go to "Step 1549-43".
Step 1549-43
Turn off the power. Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are
off.
Step 1549-44
Call for support. This ends the procedure.
300 Eserver pSeries 670 Service Guide