Replacing
the
heat
sink
and
fan
assembly
CAUTION:
The
heat
sink,
microprocessor
and
memory
module
might
be
very
hot.
Turn
off
the
computer
and
wait
three
to
five
minutes
to
let
the
computer
cool
before
opening
the
computer
cover.
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
heat
sink
and
fan
assembly.
To
replace
the
heat
sink
and
fan
assembly:
1.
Remove
the
computer
cover.
See
“Removing
the
computer
cover”
on
page
86.
2.
Lay
the
computer
on
its
side
for
easier
access
to
the
system
board.
3.
Locate
the
heat
sink
and
fan
assembly.
See
“Identifying
parts
on
the
system
board”
on
page
85.
4.
Disconnect
the
heat
sink
and
fan
assembly
cable
from
the
microprocessor
fan
connector
on
the
system
board.
5.
Rotate
the
four
screws
1
one
by
one
in
the
direction
indicated
by
the
arrows
on
the
screw
head,
so
that
the
heat
sink
and
fan
assembly
can
be
lifted
out
from
the
system
board.
Chapter
8.
Replacing
FRUs
(Type
7848)
97
Содержание 7848
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