Step 1520-4; Step 1520-5 - IBM F80 Service Manual

YES

Step 1520-4

1. Press the power button to turn off the power.
2. Unplug the system unit power cable from the wall outlet.
3. Exchange the operator panel electronics assembly.
4. Connect the system unit power cable to the wall outlet.
5. Press the power button to turn on the power.
Do the fans in the front of the machine come on and the power LED on the
operator panel come on and stay on?
NO
YES

Step 1520-5

The cooling fans, memory riser cards, or CPU card may be defective.
Exchange the FRUs that have not already been exchanged in the following order:
1. Front cooling fans (one at a time)
2. Memory riser cards (one at a time)
3. Processor card
To test each FRU:
1. Press the power button to turn off the power.
2. Unplug the system unit power cable from the wall outlet.
3. Exchange one of the FRUs in the list.
4. Connect the system unit power cable to the wall outlet.
5. Press the power button to turn on the power.
Do the fans in the front of the machine and the power LED on the operator panel
come on and stay on?
NO
If the symptom did not change and all the FRUs have been exchanged, go to
"Step 1520-4."
Replace the power supply that you removed.
Go to "MAP 410: Repair Checkout" in RS/6000 and Eserver pSeries
Diagnostic Information for Multiple Bus Systems.
Reinstall the original operator panel electronics assembly. Go to "Step 1520-5."
Go to "MAP 410: Repair Checkout" in RS/6000 and Eserver pSeries
Diagnostic Information for Multiple Bus Systems.
Reinstall the original FRU.
v If the one-way processor card was just installed, remove all of the memory
DIMMs from the processor card. If the system does not come up, replace
the processor card.
Chapter 3. Maintenance Analysis Procedures
55