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
Chapter
3,
“Parts
listing,
Type
8849
or
Type
8491
server,”
on
page
61
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
diagnose.
1.
Make
sure
that:
v
All
cables
and
cords
are
connected
securely
to
the
rear
of
the
server
and
attached
devices.
v
When
the
server
is
turned
on,
air
is
flowing
from
the
fan
grille.
If
there
is
no
airflow,
the
fan
is
not
working.
This
can
cause
the
server
to
overheat
and
shut
down.
2.
Check
the
system-error
log
(see
“Error
logs”
on
page
14).
Keyboard,
mouse,
or
pointing-device
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
Chapter
3,
“Parts
listing,
Type
8849
or
Type
8491
server,”
on
page
61
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
All
or
some
keys
on
the
keyboard
do
not
work.
1.
If
the
server
is
attached
to
a
KVM
switch,
bypass
the
KVM
switch
to
eliminate
it
as
a
possible
cause
of
the
problem:
connect
the
keyboard
cable
directly
to
the
correct
connector
on
the
rear
of
the
server.
2.
Make
sure
that:
v
The
keyboard
cable
is
securely
connected
to
the
server
and
the
keyboard
and
mouse
cables
are
not
reversed.
v
The
server
and
the
monitor
are
turned
on.
3.
Reseat
the
keyboard
cable.
4.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time:
a.
Keyboard
b.
(Trained
service
technician
only)
System
board
26
IBM
xSeries
306m
Types
8849
and
8491:
Problem
Determination
and
Service
Guide
Summary of Contents for 306m - eServer xSeries - 8849
Page 1: ...IBM xSeries 306m Types 8849 and 8491 Problem Determination and Service Guide...
Page 2: ......
Page 3: ...IBM xSeries 306m Types 8849 and 8491 Problem Determination and Service Guide...
Page 8: ...vi IBM xSeries 306m Types 8849 and 8491 Problem Determination and Service Guide...
Page 84: ...68 IBM xSeries 306m Types 8849 and 8491 Problem Determination and Service Guide...
Page 141: ......
Page 142: ...Part Number 31R1183 Printed in USA 1P P N 31R1183...
