Lenovo a57 9702 Manual Suplementar
11.
Check
the
position
of
the
voltage-selection
switch
on
the
rear
of
the
computer.
Use
a
ballpoint
pen
to
slide
the
switch,
if
necessary.
Note:
Some
computers
do
not
have
a
voltage
switch.
These
computers
automatically
control
the
voltage.
v
If
the
voltage
supply
range
is
100–127
V
ac,
set
the
switch
to
115
V.
v
If
the
voltage
supply
range
is
200–240
V
ac,
set
the
switch
to
230
V.
12.
Reconnect
all
the
power
supply
cables
to
the
drives
and
the
system
board.
13.
Go
to
Replacing
the
heat
sink
Attention
Do
not
open
your
computer
or
attempt
any
repair
before
reading
the
“Important
safety
information”
in
the
Safety
and
Warranty
Guide
that
was
included
with
your
computer.
To
obtain
a
copy
of
the
Safety
and
Warranty
Guide,
go
to
the
Support
Web
site
at
http://www.lenovo.com/support.
This
section
provides
instructions
on
how
to
replace
the
heat
sink.
To
replace
the
heat
sink:
1.
Open
the
computer
cover.
See
2.
Pivot
the
drive-bay
assembly
upward
to
gain
access
to
the
heat
sink.
See
Figure
20.
Accessing
the
heat
sink
Chapter
3.
Installing
options
and
replacing
hardware
25