Light Path Diagnostics Table - IBM xSeries 445 Installation Manual

Light path diagnostics table

Use the following table to help determine the cause of the error and the action you
should take.
Lit LED on
diagnostics panel Cause
None An error has occurred and cannot be
isolated, or the error log is full.
CPU One of the microprocessors has failed.
MEMORY A memory error occurred.
DASD One of the hot-swap hard drives has failed
PCI-X BUS An error occurred on a PCI bus.
FAN A fan has failed or is operating too slowly.
Note: A failing fan can also cause the
TEMP LED to be lit.
TEMP The system temperature has exceeded a
threshold level.
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xSeries 445 Type 8870: Installation Guide
Action
An error has occurred that is not represented
by a light path diagnostics LED. Check the
system error log for more information about the
error.
v Check the microprocessor failure LEDs on
the system board.
v If a microprocessor failure LED is on, make
sure the microprocessor is installed
correctly. (See the Option Installation Guide
on the IBM xSeries Documentation CD for
installation instructions.)
If the problem remains, call for service.
v Check the DIMM failure LEDs on the system
board.
v Replace the DIMM indicated by the lit DIMM
failure LED.
If the problem remains, call for service.
v Make sure the hard drive is installed
correctly. Remove and re-install, if
necessary.
v Check to see that the server fans are
operating correctly.
If the problem remains, call for service.
v Check the system error log.
v If you cannot isolate the failing adapter from
the information in the system error log, try to
determine the failing adapter by removing
one adapter at a time from the failing PCI-X
bus and restarting the server after each
adapter is removed.
If the problem remains, call for service.
Check the LEDs on the fans and replace the
indicated fan.
If the problem remains, call for service.
v Check to see if a fan has failed. If it has,
replace the fan.
v Make sure the room temperature is not too
hot. (See "Features and specifications" on
page 4 for temperature information.)
If the problem remains, call for service.