IBM 4846-545 Service Guide - Page 44

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Table 11. Symptoms and actions (continued) PS/2 keyboard does not work or only some keys work. 1. Ensure that the keyboard cable is securely connected. 2. Move your fingers across the keys, making sure that no keys are stuck. 3. Ensure that you are on a window that allows typing. Some windows do not allow you to type on them. 4. Run the keyboard test from the diagnostics program. 5. Replace the keyboard. Diskette drive does not work. 1. Check the diskette drive cable connections. 2. Run the CMOS Setup Utility to make sure the diskette drive controller is enabled. 3. Ensure that the correct boot device is selected in the CMOS Setup Utility, which is USB-FDD. 4. Verify the hardware by attempting to load a bootable diskette. 5. If the drive will not boot with a bootable diskette, replace the drive and cable. 6. Replace the system board. Audio is not working. 1. Check the volume control. 2. Check the speaker cable connections. 3. Run CMOS Setup Utility to make sure the audio is enabled. 4. Replace the speaker. 5. Replace the system board. Fan continues running after system has been powered Off. This is normal operation with the power supplies. Notes: 1. Some devices that attach to the system have test instructions. Refer to those instructions when testing those devices. 2. Record any error messages or symptoms for future reference. 3. When using application programs, you may receive error messages that pertain to the application software. See the application program manual for a description of those messages. 22 Models 545 and 565 Hardware Service Guide

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Table
11.
Symptoms
and
actions
(continued)
PS/2
keyboard
does
not
work
or
only
some
keys
work.
1.
Ensure
that
the
keyboard
cable
is
securely
connected.
2.
Move
your
fingers
across
the
keys,
making
sure
that
no
keys
are
stuck.
3.
Ensure
that
you
are
on
a
window
that
allows
typing.
Some
windows
do
not
allow
you
to
type
on
them.
4.
Run
the
keyboard
test
from
the
diagnostics
program.
5.
Replace
the
keyboard.
Diskette
drive
does
not
work.
1.
Check
the
diskette
drive
cable
connections.
2.
Run
the
CMOS
Setup
Utility
to
make
sure
the
diskette
drive
controller
is
enabled.
3.
Ensure
that
the
correct
boot
device
is
selected
in
the
CMOS
Setup
Utility,
which
is
USB–FDD.
4.
Verify
the
hardware
by
attempting
to
load
a
bootable
diskette.
5.
If
the
drive
will
not
boot
with
a
bootable
diskette,
replace
the
drive
and
cable.
6.
Replace
the
system
board.
Audio
is
not
working.
1.
Check
the
volume
control.
2.
Check
the
speaker
cable
connections.
3.
Run
CMOS
Setup
Utility
to
make
sure
the
audio
is
enabled.
4.
Replace
the
speaker.
5.
Replace
the
system
board.
Fan
continues
running
after
system
has
been
powered
Off.
This
is
normal
operation
with
the
power
supplies.
Notes:
1.
Some
devices
that
attach
to
the
system
have
test
instructions.
Refer
to
those
instructions
when
testing
those
devices.
2.
Record
any
error
messages
or
symptoms
for
future
reference.
3.
When
using
application
programs,
you
may
receive
error
messages
that
pertain
to
the
application
software.
See
the
application
program
manual
for
a
description
of
those
messages.
22
Models
545
and
565
Hardware
Service
Guide