IBM pSeries 670 Service Manual page 276

Step 1541-8
Turn off the power.
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 1541-9
Are all the amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 1541-10".
No Call for support.
Step 1541-10
Replace the item recorded in "Step 1541-1" on page 254.
Step 1541-11
Turn on the power.
Step 1541-12
Did the system stop with the same error code as recorded in "Step 1541-1" on page 254?
Yes Go to "Step 1541-13".
No 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 1541-13
Turn off the power.
Step 1541-14
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 1541-15
Are all the amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 1541-16".
No Call for support.
Step 1541-16
Replace the primary I/O book at U1.18-P1-H2.
Step 1541-17
Turn on the power.
256 Eserver pSeries 670 Service Guide