Removing, Power-supply-retaining, Screws – Lenovo ThinkCentre A57e User Manual
Page 30
3.
Hold
the
power
supply
and
remove
the
four
screws
at
the
rear
of
the
chassis
that
secure
the
power
supply.
4.
Remove
the
power
supply
from
the
chassis.
5.
Install
the
new
power
supply
into
the
chassis
so
that
the
screw
holes
in
the
power
supply
align
with
those
in
the
chassis.
6.
Install
the
four
screws
to
secure
the
power
supply.
Note:
Use
only
the
screws
provided
by
Lenovo.
7.
Reconnect
the
power
supply
connectors
to
the
system
board.
8.
Reconnect
a
power
supply
connector
to
each
of
the
drives.
9.
If
your
computer
has
a
voltage-selection
switch,
ensure
that
you
set
the
voltage-selection
switch
to
match
the
voltage
available
at
your
electrical
outlet.
If
necessary,
use
a
ballpoint
pen
to
slide
the
voltage-selection
switch
to
a
different
position.
v
If
the
voltage
supply
range
in
your
local
country
or
region
is
100–127
V
AC,
set
the
switch
to
115
V.
v
If
the
voltage
supply
range
is
in
your
local
country
or
region
is
200–240
V
AC,
set
the
switch
to
230
V.
10.
Go
to
Figure
16.
Removing
the
power-supply-retaining
screws
22
Hardware
Installation
and
Replacement
Guide