Lenovo ThinkCentre M50 User Manual - Page 122

alcohol.

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3. Place your hand over the retainer ring and ball 2 , and then turn the mouse over, top side up, so that the retainer ring and ball fall out into your hand. 4. Wash the ball in warm, soapy water then dry it with a clean cloth. Blow air carefully into the ball cage 4 to dislodge dust and lint. 5. Look for a build up of dirt on the plastic rollers 3 inside the ball cage. This build up usually appears as a stripe running across the middle of the rollers. 6. If the rollers are dirty, clean them by using a cotton swab soaked in isopropyl (rubbing) alcohol. Turn the rollers with your finger and continue swabbing them until all the dirt is removed. Be sure the rollers are still centered in their channels after you clean them. 7. Remove any fibers from the swab that might be remaining on the rollers. 8. Replace the ball and the retainer ring. 9. Turn your computer back on. 106 User Guide

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3.
Place
your
hand
over
the
retainer
ring
and
ball
±2²
,
and
then
turn
the
mouse
over,
top
side
up,
so
that
the
retainer
ring
and
ball
fall
out
into
your
hand.
4.
Wash
the
ball
in
warm,
soapy
water
then
dry
it
with
a
clean
cloth.
Blow
air
carefully
into
the
ball
cage
±4²
to
dislodge
dust
and
lint.
5.
Look
for
a
build
up
of
dirt
on
the
plastic
rollers
±3²
inside
the
ball
cage.
This
build
up
usually
appears
as
a
stripe
running
across
the
middle
of
the
rollers.
6.
If
the
rollers
are
dirty,
clean
them
by
using
a
cotton
swab
soaked
in
isopropyl
(rubbing)
alcohol.
Turn
the
rollers
with
your
finger
and
continue
swabbing
them
until
all
the
dirt
is
removed.
Be
sure
the
rollers
are
still
centered
in
their
channels
after
you
clean
them.
7.
Remove
any
fibers
from
the
swab
that
might
be
remaining
on
the
rollers.
8.
Replace
the
ball
and
the
retainer
ring.
9.
Turn
your
computer
back
on.
106
User
Guide