IBM 621858U Installation Guide - Page 63

Universal, Serial, problems

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Universal Serial Bus port 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 USB keyboard do not work. 1. If you have installed 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 the computer and the monitor are turned on. 3. If a USB hub is in use, disconnect the USB device from the hub and connect it directly to the computer. 4. Replace the following components one at a time, in the order shown, restarting the computer each time: a. Keyboard b. (Trained service technician only) System board The USB mouse or USB pointing device does not work. 1. Make sure that: v The mouse or pointing-device USB cable is securely connected to the computer. v The mouse or pointing device drivers are installed correctly. v Keyboardless operation has been enabled in the Configuration/Setup Utility program. 2. If a USB hub is in use, disconnect the USB device from the hub and connect it directly to the computer. 3. Replace the following components one at a time, in the order shown, restarting the computer each time: a. Mouse or pointing device b. (Trained service technician only) System board A USB device does not work. 1. Run the USB diagnostics, (see "Running the diagnostic programs" in the Problem Determination and Service Guide). 2. Make sure that: v The correct USB device driver is installed. v The operating system supports USB devices. v A standard PS/2 keyboard or mouse is not connected to the computer. If it is, a USB keyboard or mouse will not work during POST. 3. Make sure that the USB configuration options are set correctly in the Configuration/Setup Utility program menu (see the User's Guide for more information). 4. If you are using a USB hub, disconnect the USB device from the hub and connect it directly to the computer. Chapter 5. Solving problems 51

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Universal
Serial
Bus
port
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
USB
keyboard
do
not
work.
1.
If
you
have
installed
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
the
computer
and
the
monitor
are
turned
on.
3.
If
a
USB
hub
is
in
use,
disconnect
the
USB
device
from
the
hub
and
connect
it
directly
to
the
computer.
4.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
computer
each
time:
a.
Keyboard
b.
(Trained
service
technician
only)
System
board
The
USB
mouse
or
USB
pointing
device
does
not
work.
1.
Make
sure
that:
v
The
mouse
or
pointing-device
USB
cable
is
securely
connected
to
the
computer.
v
The
mouse
or
pointing
device
drivers
are
installed
correctly.
v
Keyboardless
operation
has
been
enabled
in
the
Configuration/Setup
Utility
program.
2.
If
a
USB
hub
is
in
use,
disconnect
the
USB
device
from
the
hub
and
connect
it
directly
to
the
computer.
3.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
computer
each
time:
a.
Mouse
or
pointing
device
b.
(Trained
service
technician
only)
System
board
A
USB
device
does
not
work.
1.
Run
the
USB
diagnostics,
(see
“Running
the
diagnostic
programs”
in
the
Problem
Determination
and
Service
Guide).
2.
Make
sure
that:
v
The
correct
USB
device
driver
is
installed.
v
The
operating
system
supports
USB
devices.
v
A
standard
PS/2
keyboard
or
mouse
is
not
connected
to
the
computer.
If
it
is,
a
USB
keyboard
or
mouse
will
not
work
during
POST.
3.
Make
sure
that
the
USB
configuration
options
are
set
correctly
in
the
Configuration/Setup
Utility
program
menu
(see
the
User’s
Guide
for
more
information).
4.
If
you
are
using
a
USB
hub,
disconnect
the
USB
device
from
the
hub
and
connect
it
directly
to
the
computer.
Chapter
5.
Solving
problems
51