Mappwr-9: 2.5 V Current/Voltage Problem In Processor Subsystem - IBM iSeries Series Hardware Problem Analysis And Isolation

v Yes: Exchange the line cord, and Continue with the next step.
7. Press the (white) Service Complete button. Is error code that sent you to this procedure still reported?
v No: The problem has been corrected. See Verify the repair.
This ends the procedure.
v Yes: Call your next level of support.
This ends the procedure.

MAPPWR-9: 2.5 V current/voltage problem in processor subsystem

For use by authorized service providers.
Note: Read the Danger and caution notices in the "MAPPWR" on page 364 introduction before performing
this procedure.
1. Record the error code and location codes that sent you to this procedure.
2. Power off the system. See Power on/off the system and logical partitions. Then, examine the amber
logic-power LEDs of all installed processor subsystem DCAs.
3. Are all amber logic-power LEDs of all installed processor subsystem DC converter assemblies
(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 "DCAPWR" on
page 324.
4. Pull out the following books about 25 mm (1 inch), if present. See Models 870 and 890 - Memory
books and memory blanks:
v Memory book 0 at location M18
v Memory book 1 at location M24
v Memory book 2 at location M07
v Memory book 3 at location M02
5. Power on the system. See Power on/off the system and logical partitions.
6. Did the system stop with the same error code as recorded in step 1 (See page 375)?
v Yes: Go to step 12 (See page 375).
v No: Continue with the next step.
7. One of the books 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.
8. Reinsert one of the books that is pulled out and listed in step 4 (See page 375).
9. Power on the system. See Power on/off the system and logical partitions.
10. Did the system stop with the same error code as recorded in step 1 (See page 375)?
v Yes: The book just reinserted is defective. Replace it and return the system to its original
configuration. See Verify the repair.
This ends the procedure.
v No: Continue with the next step.
11. Have all the books listed in step 4 (See page 375) been reinserted?
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 8 (See page 375).
12. Power off the system. See Power on/off the system and logical partitions. Then, examine the amber
logic-power LEDs of all installed processor subsystem DCAs.
13. Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Analyze hardware problems
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