IBM 621858U Installation Guide - Page 56

Intermittent, problems

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Intermittent 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 parts listing in the Problem Determination and Service Guide 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. Symptom Action A problem occurs only occasionally and is difficult to detect. Make sure that: v All cables and cords are connected securely to the rear of the computer and attached options. v When the computer is turned on, air is flowing from the front of the computer at the fan grille. If there is no airflow, the fan is not working. This can cause the computer to overheat and shut down. v Make sure that the SCSI bus and devices are configured correctly and that the last external device in each SCSI chain is terminated correctly. 44 IBM IntelliStation M Pro Type 6218: Installation Guide

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Intermittent
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
parts
listing
in
the
Problem
Determination
and
Service
Guide
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.
Symptom
Action
A
problem
occurs
only
occasionally
and
is
difficult
to
detect.
Make
sure
that:
v
All
cables
and
cords
are
connected
securely
to
the
rear
of
the
computer
and
attached
options.
v
When
the
computer
is
turned
on,
air
is
flowing
from
the
front
of
the
computer
at
the
fan
grille.
If
there
is
no
airflow,
the
fan
is
not
working.
This
can
cause
the
computer
to
overheat
and
shut
down.
v
Make
sure
that
the
SCSI
bus
and
devices
are
configured
correctly
and
that
the
last
external
device
in
each
SCSI
chain
is
terminated
correctly.
44
IBM
IntelliStation
M
Pro
Type
6218:
Installation
Guide