Lenovo ThinkCentre A50p (English, Dutch, French, German, Italian) Quick refere - Page 42

Symptom, Action

Page 42 highlights

Symptom The keyboard does not work. The computer does not respond to the keyboard. Action Verify that: v The computer and monitor are turned on and the brightness and contrast controls are set correctly. v The keyboard is securely connected to the keyboard connector on the computer. v No keys are stuck. If you cannot correct the problem, have the computer serviced. The Rapid Access III Verify that: Keyboard does not work v The computer is turned on. v The keyboard is securely connected to a USB connector on the rear of the computer. v No keys are stuck. The mouse does not work. The computer does not respond to the mouse. Note: This applies to a mechanical mouse only. If you cannot correct the problem, have the computer serviced. Clean the mouse. Verify that: v The computer and monitor are turned on and the brightness and contrast controls are set correctly. v The mouse is securely connected to the mouse connector on the computer. The operating system will not start. If you cannot correct the problem, have the computer serviced. Verify that: v There is no diskette in the diskette drive. v The startup sequence includes the device where the operating system resides. Usually, the operating system is on the hard disk. During startup, look for the prompt to start the IBM Setup Utility program. Press the function key that is specified. Verify the startup sequence in the IBM Setup Utility program. If you cannot correct the problem, have the computer serviced. An error code is displayed before the operating system starts. Write down the code number, and see "Error codes" on page 18. The computer beeps Verify that no keys are stuck down. multiple times before the operating system starts. If you cannot correct the problem, have the computer serviced. 16 Quick Reference

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Symptom
Action
The
keyboard
does
not
work.
The
computer
does
not
respond
to
the
keyboard.
Verify
that:
v
The
computer
and
monitor
are
turned
on
and
the
brightness
and
contrast
controls
are
set
correctly.
v
The
keyboard
is
securely
connected
to
the
keyboard
connector
on
the
computer.
v
No
keys
are
stuck.
If
you
cannot
correct
the
problem,
have
the
computer
serviced.
The
Rapid
Access
III
Keyboard
does
not
work
Verify
that:
v
The
computer
is
turned
on.
v
The
keyboard
is
securely
connected
to
a
USB
connector
on
the
rear
of
the
computer.
v
No
keys
are
stuck.
If
you
cannot
correct
the
problem,
have
the
computer
serviced.
The
mouse
does
not
work.
The
computer
does
not
respond
to
the
mouse.
Note:
This
applies
to
a
mechanical
mouse
only.
Clean
the
mouse.
Verify
that:
v
The
computer
and
monitor
are
turned
on
and
the
brightness
and
contrast
controls
are
set
correctly.
v
The
mouse
is
securely
connected
to
the
mouse
connector
on
the
computer.
If
you
cannot
correct
the
problem,
have
the
computer
serviced.
The
operating
system
will
not
start.
Verify
that:
v
There
is
no
diskette
in
the
diskette
drive.
v
The
startup
sequence
includes
the
device
where
the
operating
system
resides.
Usually,
the
operating
system
is
on
the
hard
disk.
During
startup,
look
for
the
prompt
to
start
the
IBM
Setup
Utility
program.
Press
the
function
key
that
is
specified.
Verify
the
startup
sequence
in
the
IBM
Setup
Utility
program.
If
you
cannot
correct
the
problem,
have
the
computer
serviced.
An
error
code
is
displayed
before
the
operating
system
starts.
Write
down
the
code
number,
and
see
“Error
codes”
on
page
18.
The
computer
beeps
multiple
times
before
the
operating
system
starts.
Verify
that
no
keys
are
stuck
down.
If
you
cannot
correct
the
problem,
have
the
computer
serviced.
16
Quick
Reference