IBM 7012 G Series, Service Manual

Page: 106 / 264

3-1540-8
Service Guide
Step 6
(from Step 5)
One of the installed parts is defective.
To test each part, exchange them in the following order:
•
System planar
•
CPU card
•
Memory card
•
Power supply
The system is working correctly if it stops with
269
displayed in the operator panel display
or if the Maintenance Menu displays. If this does not occur, the last part you installed is
defective.
1. Power off the system unit.
2. Unplug the system unit power cord from the wall outlet.
3. Exchange one of the parts in the list.
4. Connect the system unit power cable to the wall outlet.
5. Power on the system unit.
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.