IBM pSeries 690 Service Manual page 246

Step 152c-41
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152c-42."
No Call for support.
Step 152c-42
Record the location of each installed L3 module.
Attention: L3 modules have a limit of three plug cycles. Before removing any of the L3 modules in the
following list, call for support.
Remove all of the following modules, if present:
v L3 module, at location U1.18-P1-C5
v L3 module, at location U1.18-P1-C6
v L3 module, at location U1.18-P1-C7
v L3 module, at location U1.18-P1-C8
v L3 module, at location U1.18-P1-C9
v L3 module, at location U1.18-P1-C10
v L3 module, at location U1.18-P1-C11
v L3 module, at location U1.18-P1-C12
v L3 module, at location U1.18-P1-C13
v L3 module, at location U1.18-P1-C14
v L3 module, at location U1.18-P1-C15
v L3 module, at location U1.18-P1-C16
v L3 module, at location U1.18-P1-C17
v L3 module, at location U1.18-P1-C18
v L3 module, at location U1.18-P1-C19
v L3 module, at location U1.18-P1-C20
v System clock, at location U1.18-P1-X5
Step 152c-43
Turn on the power.
Step 152c-44
Did the system stop with the same error code as recorded in "Step 152c-1" on page 225?
Yes Go to "Step 152c-50" on page 231.
No Go to "Step 152c-45."
Step 152c-45
One of the modules just removed is defective.
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152c-46
Reinstall one of the modules that is removed and listed in "Step 152c-42."
230 Eserver pSeries 690 Service Guide