10.
Rotate
handle
1
to
release
the
heat
sink
clamp
and
then
disengage
the
clamp
from
the
plastic
retention
bracket.
11.
Lift
the
heat
sink
and
fan
assembly
off
the
failing
system
board.
Place
the
heat
sink
on
its
side
so
that
the
thermal
grease
does
not
come
in
contact
with
anything.
Note:
You
might
have
to
gently
twist
the
heat
sink
to
free
it
from
the
microprocessor.
12.
Remove
the
retention
module
from
the
rear
of
the
failing
system
board
and
install
it
in
the
same
position
on
the
new
system
board.
13.
To
release
the
microprocessor
2
from
the
system
board
socket,
lift
the
small
handle
1
.
Chapter
9.
Replacing
FRUs
-
Desktop
computers
127
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