IBM x3500 - System - 7977 - Light Path Diagnostics Leds

Light path diagnostics LEDs
The following table describes the LEDs on the light path diagnostics panel and
suggested actions to correct the detected problems.
v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the Problem Determination and Service Guide on the IBM System x Documentation CD to 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.
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 restoring dc power.
POWER SUPPLY 2 Power supply 2 has failed or has
been removed.
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 restoring dc power.
CONFIG Microprocessor configuration error.
1. Mismatched microprocessors, remove and install
two microprocessor of the same cache size, type,
and clock speed.
2. Check the system error log for information
indicating incompatible components.
Chapter 5. Solving problems 91