IBM 6C1, Service Manual

Page: 70 / 377

Step 1240-4
One of the FRUs remaining in the system unit is defective.
1. Turn off the power.
2. Replace the following FRUs (one at a time) in the order listed.
v
Memory card
v
System board
v
Processor card, processor #1, then processor #2
3. Turn on the power.
Note: Replacing any of the above listed FRUs may result in missing and new
resources.
Does the system stop with a memory checkpoint or error code displayed on the
operator panel?
NO Go to
″
MAP 0410: Repair Checkout
″
in the RS/6000
Eserver
pSeries
Diagnostic Information for Multiple Bus Systems.
YES Reinstall the original FRU.
Repeat this step until the defective FRU is identified or all the FRUs have been
exchanged.
If the symptom did not change and all FRUs have been exchanged, go to
“MAP 1540: Minimum Configuration” on page 63.
Step 1240-5
The memory DIMM(s) (may be both) you exchanged in the previous step may be
defective. To isolate the failing memory module, do the following:
1. Turn off the power.
2. Reinstall one of the memory DIMMs you exchanged in the previous step.
3. Turn on the power.
Does the system stop with a memory checkpoint or error code displayed on the
operator panel?
NO Repeat this step with the second memory DIMM you exchanged in the
previous step.
Go to
″
MAP 0410: Repair Checkout
″
in the RS/6000
Eserver
pSeries
Diagnostic Information for Multiple Bus Systems.
YES Replace the memory DIMM.
If you have not tested both memory DIMMs, repeat this step with the second
memory module you exchanged in the previous step.
If the symptom did not change and both memory DIMMs have been
exchanged, go to “Step 1240-4”.
52
Service Guide