b.
Do
not
touch
the
thermal
grease
while
handling
the
heat
sink
and
fan
assembly.
7.
Position
the
new
heat
sink
and
fan
assembly
on
the
microprocessor
so
that
the
four
screws
are
aligned
with
the
holes
on
the
system
board.
Note:
Position
the
new
heat
sink
and
fan
assembly
so
that
the
heat
sink
and
fan
assembly
cable
is
toward
the
microprocessor
fan
connector
on
the
system
board.
8.
Alternate
tightening
each
screw
a
small
and
equal
amount
until
the
heat
sink
and
fan
assembly
is
secured
to
the
system
board.
Do
not
over-tighten
the
screws.
9.
Connect
the
heat
sink
and
fan
assembly
cable
to
the
microprocessor
fan
connector
on
the
system
board.
10.
Go
to
“Completing
the
parts
replacement”
on
page
44.
Replacing
the
front
fan
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
was
included
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
front
fan
assembly.
To
replace
the
front
fan
assembly:
1.
Remove
the
computer
cover.
See
“Removing
the
computer
cover”
on
page
14.
2.
Remove
the
front
bezel.
See
“Removing
and
installing
the
front
bezel”
on
page
16.
3.
Disconnect
the
front
fan
assembly
cable
from
the
power
fan
connector
on
the
system
board.
See
“Locating
parts
on
the
system
board”
on
page
11.
Chapter
2.
Installing
options
and
replacing
hardware
37
Summary of Contents for 7268D1U
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