Lenovo THINKPAD T40 User Manual
If
the
keyboard
problem
is
resolved,
carefully
reconnect
the
external
numeric
keypad,
external
keyboard,
or
mouse,
making
sure
that
you
have
seated
the
connectors
properly.
If
keys
on
the
keyboard
still
do
not
work,
have
the
computer
serviced.
Problem:
A
number
appears
when
you
type
a
letter.
Solution
The
numeric
lock
function
is
on.
To
disable
it,
press
and
hold
Shift;
then
press
NumLk.
Problem:
All
or
some
of
the
keys
on
the
external
numeric
keypad
do
not
work.
Solution:
Make
sure
that
the
external
numeric
keypad
is
correctly
connected
to
the
computer.
Problem
Some
or
all
of
the
keys
on
the
external
PS/2
keyboard
do
not
work.
Solution
If
you
are
using
the
ThinkPad
Dock
II,
the
ThinkPad
Mini
Dock,
or
the
ThinkPad
Port
Replicator
II,
make
sure
that
the
keyboard
cable
is
correctly
connected
to
the
keyboard
connector.
If
the
connection
is
correct,
disconnect
the
cable
and
make
sure
that
the
built-in
keyboard
operates
properly.
If
the
built-in
keyboard
works,
there
is
a
problem
with
the
external
keyboard.
Try
using
a
different
external
keyboard.
UltraNav
problems
Problem:
The
pointer
drifts
when
the
computer
is
turned
on
or
after
it
resumes
normal
operation.
Solution:
The
pointer
might
drift
when
you
are
not
using
the
TrackPoint
during
normal
operation.
This
is
a
normal
characteristic
of
the
TrackPoint
and
is
not
a
defect.
Pointer
drifting
might
occur
for
several
seconds
under
the
following
conditions:
v
When
the
computer
is
turned
on.
v
When
the
computer
resumes
normal
operation.
v
When
the
TrackPoint
is
pressed
for
a
long
time.
v
When
the
temperature
changes.
Problem:
The
mouse
or
the
pointing
device
does
not
work.
Solving
computer
problems
20
ThinkPad
®
T40
Series
Service
and
Troubleshooting
Guide