IBM 7015-R50, Installation And Service Manual

Page: 110 / 300

3-1540-8
Service Guide
Step 6
(from Step 5)
One of the FRUs remaining in the CPU Enclosure is defective.
To test each FRU, exchange the FRUs in the following order:
•
System planar (SP)
•
I/O card (IOC)
•
CPU cards (CPU)
•
Memory cards (MC)
•
I/O planars
•
CPU module flex cables
•
I/O module flex cables
1. Set the power button on the CPU Enclosure to Off.
2. Unplug both PDB outlet power cords from both power supply power cords.
3. Exchange one of the FRUs in the list.
4. Plug both PDB outlet power cords into both power supply power cords.
5. Set the power button on the CPU Enclosure to On.
6. Wait for one of the following conditions to occur:
•
The Maintenance Menu is displayed.
•
The same three digit number is displayed in the operator panel display for longer than
three minutes except for the number
165
which may display for up to ten minutes with
no activity on the BUMP console.
•
The number
888
is flashing in the operator panel display.
Is the maintenance menu displayed?
NO Reinstall the original FRU.
Repeat Step 6 until the defective FRU is identified or all the FRUs have
been exchanged.
If the symptom did not change and all the FRUs have been exchanged, call
your service support person for assistance.
If the symptom has changed, check for loose cards, cables, and obvious
problems. If you do not find a problem, return to Step 1 in this MAP, and
follow the instructions for the new symptom.
YES Go to “Map 0410: Repair Checkout” in the Diagnostic Information For Micro
Channel Bus Systems.