v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, “Parts listing, System x3500 Type 7977,” on page 41to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Lit light path
diagnostics LED with
the system-error or
information LED also
lit Description Action
All LEDs are off (the
power LED is lit; the
information LED might
be lit).
No action is necessary.
POWER SUPPLY 1 Power supply 1 has failed or has
been removed; also see
“Power-supply LEDs” on page 137.
Note: In a redundant power
configuration, the dc power LED on
one power supply might be off.
1. Reinstall the power supply 1.
2. Check the individual power-supply LEDs.
3. Reseat the following components:
a. Power supply
b. (Trained service technician only) Power
backplane
4. Replace the components listed in step 3, one at a
time, in the order shown, restarting the server each
time.
5. If a 240 V ac fault has occurred, remove ac power
before you restore dc power.
POWER SUPPLY 2 Power supply 2 has failed or has
been removed; also see
“Power-supply LEDs” on page 137.
Note: In a redundant power
configuration, the dc power LED on
one power supply might be off.
1. Reinstall the power supply 2.
2. Check the individual power-supply LEDs.
3. Reseat the following components:
a. Power supply
b. (Trained service technician only) Power
backplane
4. Replace the components listed in step 3, one at a
time, in the order shown, restarting the server each
time.
5. If a 240 V ac fault has occurred, remove ac power
before you restore dc power.
CONFIG Microprocessor configuration error.
1. Install two microprocessors of the same cache
size, type, and clock speed.
2. Check the system-error log for information that
indicates incompatible components.
TEMP A system temperature or component
has exceeded specifications.
Note: A fan LED might also be lit.
1. See the BMC log or the system-error log (see
“Error logs” on page 100) for the source of the
fault.
2. Make sure that the airflow in the server is not
blocked.
3. If a fan LED is lit, reseat the fan.
4. Replace the fan for which the LED is lit.
5. Make sure that the room is neither too hot nor too
cold (see “Environment” in “Features and
specifications” on page 3).
134 IBM System x3500 Type 7977: Problem Determination and Service Guide
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