IBM pSeries 670 Service Manual page 218

Step 152f-40
Turn off the power.
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 152f-41
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152f-42".
No Call for support.
Step 152f-42
Remove the system clock card, at location U1.18-P1-X5.
Step 152f-43
Turn on the power.
Step 152f-44
Did the system stop with the same error code as recorded in "Step 152f-1" on page 193?
Yes Go to "Step 152f-50" on page 199.
No Go to "Step 152f-45".
Step 152f-45
The system clock card is defective.
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152f-46
Reinstall the system clock card that you removed in "Step 152f-42".
Step 152f-47
Turn on the power.
Step 152f-48
Did the system stop with the same error code as recorded in "Step 152f-1" on page 193?
Yes The system clock card just reinserted is defective, replace it. 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 152f-49" on page 199.
198 Eserver pSeries 670 Service Guide