6.
Carefully
take
note
of
the
location
of
all
cable
connections
on
the
system
board
and
disconnect
all
cables.
See
“Locating
parts
on
the
system
board”
on
page
89.
7.
Remove
the
screws
that
secure
the
system
board
to
the
chassis.
8.
Lift
the
system
board
out
of
the
chassis.
9.
Remove
the
memory
modules
from
the
failing
system
board
and
install
them
in
the
same
location
on
the
new
system
board.
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.
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.
Chapter
8.
Replacing
FRUs
-
Tower
Computers
93
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