IBM 79856au Installation Guide - Page 77

Intermittent, problems, Keyboard, mouse, pointing-device

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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 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 or BMC log (see "Error Logs" in the Problem Determination and Service Guide). 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 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 All or some keys on the keyboard do not work. 1. If you are using a USB keyboard, run the Configuration/Setup Utility program and enable keyboardless operation to prevent the POST error message 301 from being displayed during startup. 2. Make sure that: v The keyboard cable is securely connected. v The server and the monitor are turned on. 3. If you are using a USB keyboard and it is connected to a USB hub, disconnect the keyboard from the hub and connect it directly to the server. 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 Chapter 5. Solving problems 63

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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
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
or
BMC
log
(see
“Error
Logs”
in
the
Problem
Determination
and
Service
Guide
).
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
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
All
or
some
keys
on
the
keyboard
do
not
work.
1.
If
you
are
using
a
USB
keyboard,
run
the
Configuration/Setup
Utility
program
and
enable
keyboardless
operation
to
prevent
the
POST
error
message
301
from
being
displayed
during
startup.
2.
Make
sure
that:
v
The
keyboard
cable
is
securely
connected.
v
The
server
and
the
monitor
are
turned
on.
3.
If
you
are
using
a
USB
keyboard
and
it
is
connected
to
a
USB
hub,
disconnect
the
keyboard
from
the
hub
and
connect
it
directly
to
the
server.
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
Chapter
5.
Solving
problems
63