Mappwr-D: 3.3 V Current/Voltage Problem In Processor Subsystem - IBM iSeries Series Hardware Problem Analysis And Isolation

v MCM module 3 at location M14
v MCM module 1 at location M16
v MCM module 2 at location M11
23. Power on the system. See Power on/off the system and logical partitions.
24. Did the system stop with the same error code as recorded in step 1 (See page 386)?
v Yes: Go to step 30 (See page 388).
v No: Continue with the next step.
25. One of the modules just removed is defective.
a. Power off the system. See Power on/off the system and logical partitions.
b. Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
26. Attention: Before you remove or replace an MCM module, stop, read, and understand the Testing
MCMs and passthru modules for a short circuit procedure.
Attention: MCM modules have a limit of three plug cycles. Before replacing any of the MCMs in the
following list, call your next level of support.
Reinstall one of the MCM modules that is removed and listed in step 22 (See page 387).
27. Power on the system. See Power on/off the system and logical partitions.
28. Did the system stop with the same error code as recorded in step 1 (See page 386)?
v Yes: The module just reinserted is defective. Replace it. Return the system to its original
configuration. See Verify the repair.
This ends the procedure.
v No: Continue with the next step.
29. Have all the modules listed in step 22 (See page 387) been reinstalled?
v Yes: The symptom has changed. Return the system to its original configuration. See Verify the
repair.
This ends the procedure.
v No: Go to step 25 (See page 388).
30. Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
31. Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
v Yes: Continue with the next step.
v No: Replace the DCA that has the amber logic power LED that did not turn off. See symbolic FRU
"DCAPWR" on page 324.
32. Attention: Before replacing the system backplane, call your next level of support.
Replace the system backplane at location M1.
33. Power on the system. See Power on/off the system and logical partitions.
34. Did the system stop with the same error code as recorded in step 1 (See page 386)?
v Yes: Continue with the next step.
v No: The system backplane was defective. Return the system to its original configuration. See
Verify the repair.
This ends the procedure.
35. Power off the system. See Power on/off the system and logical partitions. Then, make sure all amber
logic-power LEDs of all installed processor subsystem DCAs are off.
36. Has the system backplane been replaced?
v Yes: Call your next level of support.
v No: Go to step 32 (See page 388).

MAPPWR-D: 3.3 V current/voltage problem in processor subsystem

For use by authorized service providers.
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iSeries: iSeries Server 270, 800, 810, 820, 825, 830, 840, 870, 890, SB2, and SB3 Hardware Problem Analysis and
Isolation