5. Exchange the following parts in the system unit, one at time. After exchanging a part, reconnect the
mainline ac power cables to the power outlet and attempt to power on the system. If the system
powers on, the FRU you exchanged is the failing item. If the system does not power on, exchange
the next part in the list. If the system does not power on after exchanging all the FRUs in the list, ask
your next level of support for assistance.
a. System unit control panel card (see symbolic FRU “CTLPNL” on page 323) and cables
b. SPCN card (see symbolic FRU “TWRCARD” on page 470)
c. Power supply (see symbolic FRU “PWRSPLY” on page 431)
This ends the procedure.
6. Are you working on a power distribution unit with tripped breakers?
v No: Continue with the next step.
v Yes: Reset the tripped power distribution breaker, and go to the power problem procedure for the
unit that is connected to the tripped breaker.
This ends the procedure.
7. Does the system have an external uninterruptible power supply installed?
v Yes: Continue with the next step.
v No: Go to step 10 (See page 33).
8. Use a multimeter to measure the ac voltage at the external uninterruptible power supply outlets. Is
the ac voltage from 200 V ac to 240 V ac or from 100 V ac to 127 V ac?
v No: Continue with the next step.
v Yes: Exchange the ac power jumper cable - part as installed.
This ends the procedure.
9. DANGER
Dangerous voltage being measured. (RSFTD005)
Perform the following:
a. Disconnect the mainline ac power cables from the external uninterruptible power supply.
b. Use a multimeter to measure the ac voltage at the external uninterruptible power supply end of
the mainline ac power cables.
Is
the ac voltage from 200 V ac to 240 V ac or from 100 V ac to 127 V ac?
v No: Continue with the next step.
v Yes: The uninterruptible power supply (UPS) needs service: - For 9910 type UPS Call IBM Service
Support. For all other UPS call the UPS provider. Go to step 11 (See page 34) to verify system.
10. DANGER
Dangerous voltage being measured. (RSFTD005)
Perform the following:
a. Disconnect the mainline ac power cable from the customer’s ac power outlet.
b. Use a multimeter to measure the ac voltage at the customer’s ac power outlet.
Note: Some system models have more than one mainline ac power cable. For these models,
disconnect all the mainline ac power cables and measure the ac voltage at all ac power outlets
before answering the following question.
Is
the ac voltage from 200 V ac to 240 V ac or from 100 V ac to 127 V ac?
v Yes: Exchange the mainline ac power cable. Then, go to step 1 (See page 32).
v No: Inform the customer that the ac voltage at the power outlet is not correct and reconnect the
mainline ac power cables to the power outlet when the ac voltage at the power outlet is correct.
This ends the procedure.
Analyze hardware problems 33
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