IBM 8872 Service Guide - Page 72

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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, Type 8872 and Type 8874," on page 93 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 system-information LED also lit Description Action FAN A fan has failed or has been 1. Reinstall the removed fan. removed. Note: A failing fan can also cause 2. If an individual fan LED is lit, replace the fan. the TEMP LED to be lit. 3. Reseat the microprocessor tray. 4. (Trained service technician only) Replace the microprocessor tray. PCI BRD The PCI-X board has failed. 1. (Trained service technician only) Reseat the PCI-X board assembly. 2. (Trained service technician only) Replace the PCI-X board assembly. CPU BRD The microprocessor tray has failed. 1. Reseat the microprocessor tray. 2. (Trained service technician only) Replace the microprocessor tray. I/O BRD The I/O board has failed. 1. Reseat the I/O board. 2. Replace the I/O board. 56 IBM xSeries 460 Type 8872 and xSeries MXE 460 Type 8874: Problem Determination and Service Guide

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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,
Type
8872
and
Type
8874,”
on
page
93
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
system-information
LED
also
lit
Description
Action
FAN
A
fan
has
failed
or
has
been
removed.
Note:
A
failing
fan
can
also
cause
the
TEMP
LED
to
be
lit.
1.
Reinstall
the
removed
fan.
2.
If
an
individual
fan
LED
is
lit,
replace
the
fan.
3.
Reseat
the
microprocessor
tray.
4.
(Trained
service
technician
only)
Replace
the
microprocessor
tray.
PCI
BRD
The
PCI-X
board
has
failed.
1.
(Trained
service
technician
only)
Reseat
the
PCI-X
board
assembly.
2.
(Trained
service
technician
only)
Replace
the
PCI-X
board
assembly.
CPU
BRD
The
microprocessor
tray
has
failed.
1.
Reseat
the
microprocessor
tray.
2.
(Trained
service
technician
only)
Replace
the
microprocessor
tray.
I/O
BRD
The
I/O
board
has
failed.
1.
Reseat
the
I/O
board.
2.
Replace
the
I/O
board.
56
IBM
xSeries
460
Type
8872
and
xSeries
MXE
460
Type
8874:
Problem
Determination
and
Service
Guide