IBM pSeries 630 6C4 Service Manual page 129

Step 1521-5
Turn off the power and do the following:
For Model 6C4:
1. Unplug the the system unit power cables from the power distribution panel.
2. Unplug the power cables from the system unit.
3. Check that the power cables have continuity.
4. Check that the power distribution panel outlets have the correct voltage.
For Model 6E4:
1. Unplug the power cables from the wall outlet.
2. Unplug the power cables from the system unit.
3. Check that the power cables have continuity.
4. Check that the wall outlet has been wired correctly with the correct voltage.
Did you find a problem?
NO Go to "Step 1521-6".
Correct the problem. Go to "MAP 0410: Repair Checkout" in the RS/6000 Eserver pSeries
YES
Diagnostic Information for Multiple Bus Systems.
Step 1521-6
1. One of the following may be defective:
v Power supplies
v CEC backplane
v Memory DIMMs
v Processor cards
2. To test each FRU, exchange the FRUs that have not already been exchanged in the following order.
v Primary power supply
v Redundant power supply (if installed)
v CEC backplane
v Memory DIMMs
v Processor card(s)
3. Turn off the power.
4. Unplug the power cables from the system unit.
5. Exchange one of the FRUs in the list.
6. Connect the power cables to the system unit.
Do the ac power LEDs on the power supplies come on within 30 seconds after applying ac power?
NO 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 the FRUs have been exchanged, call service support for
assistance.
Go to "MAP 0410: Repair Checkout" in the RS/6000 Eserver pSeries Diagnostic Information for
YES
Multiple Bus Systems.
Chapter 3. Maintenance Analysis Procedures (MAPs)
109