Replacing
the
power
supply
assembly
Attention
Do
not
open
your
computer
or
attempt
any
repair
before
reading
and
understanding
the
“Important
safety
information”
in
the
ThinkCentre
Safety
and
Warranty
Guide
that
came
with
your
computer.
To
obtain
a
copy
of
the
ThinkCentre
Safety
and
Warranty
Guide
,
go
to:
http://www.lenovo.com/support
This
section
provides
instructions
on
how
to
replace
the
power
supply
assembly.
To
replace
the
power
supply
assembly:
1.
Remove
the
computer
cover.
See
“Removing
the
computer
cover”
on
page
14.
2.
Disconnect
the
power
supply
assembly
cables
from
the
system
board
and
all
drives.
See
“Locating
parts
on
the
system
board”
on
page
11.
3.
Lay
the
computer
on
its
side
and
remove
the
four
screws
at
the
rear
of
the
chassis
that
secure
the
power
supply
assembly.
4.
Remove
the
old
power
supply
assembly
from
the
chassis.
5.
Ensure
that
the
power
supply
assembly
is
the
correct
replacement.
Some
power
supply
assemblies
automatically
sense
the
voltage,
some
power
supply
assemblies
are
voltage
specific,
and
some
power
supply
assemblies
have
a
voltage-selection
switch.
If
your
computer
has
a
voltage-selection
switch,
ensure
that
you
set
the
voltage-selection
switch
of
the
new
power
supply
assembly
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
in
your
local
country
or
region
is
200–240
V
AC,
set
the
switch
to
230
V.
6.
Install
the
new
power
supply
assembly
into
the
chassis
so
that
the
screw
holes
in
the
power
supply
assembly
align
with
those
in
the
chassis.
Figure
17.
Removing
the
retaining
screws
for
the
power
supply
assembly
Chapter
2.
Installing
options
and
replacing
hardware
27
Summary of Contents for 7515D9U
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Page 82: ...11 Reconnect the mouse cable to the computer 12 Turn your computer back on 74 User Guide ...
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