Replacing
the
power
switch/LED
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
switch/LED
assembly.
To
replace
the
power
switch/LED
assembly:
1.
Remove
cover.
See
“Removing
the
computer
cover”
on
page
117.
2.
Remove
the
drive
bay
assembly.
See
“Accessing
the
system
board
components
and
drives”
on
page
119.
3.
Remove
the
hard
disk
drive.
See
“Replacing
the
hard
disk
drive”
on
page
132.
4.
Disconnect
the
power
switch/LED
assembly
cable
from
the
system
board.
See
“Locating
parts
on
the
system
board”
on
page
119.
5.
Remove
the
screw
that
secures
the
power
switch/LED
assembly
to
the
chassis.
6.
Note
the
power
switch/LED
assembly
cable
routing
and
remove
the
assembly
from
the
chassis.
7.
Route
the
cable
for
the
new
power
switch/LED
assembly
through
the
hole
in
the
chassis
and
to
the
system
board.
8.
Install
the
power
switch/LED
assembly
into
the
chassis
and
secure
the
assembly
with
the
screw.
9.
Connect
the
power
switch/LED
cable
to
the
system
board.
10.
Reinstall
the
hard
disk
drive.
See
“Replacing
the
hard
disk
drive”
on
page
132.
11.
Align
the
drive
bay
assembly
with
the
two
slots
and
rails
on
the
sides
of
the
chassis
slide
the
drive
bay
assembly
towards
the
rear
of
the
chassis
until
it
snaps
into
position.
12.
Reinstall
the
front
bezel.
13.
Go
to
“Completing
the
FRU
replacement”
on
page
140.
136
Hardware
Maintenance
Manual
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