21.
Connect
the
heat
sink
and
fan
assembly
cable
to
the
new
system
board.
See
the
system
board
illustration
for
your
machine
type
at
“Locating
parts
on
the
system
board”
on
page
125.
22.
Install
the
new
system
board
into
the
chassis
and
align
the
screw
holes
with
those
in
the
chassis.
Insert
and
tighten
the
screws
that
secure
the
system
board.
23.
Pivot
the
hard
disk
drive
back
into
position.
24.
Connect
the
power
and
signal
cables
to
the
hard
disk
drive.
25.
Connect
all
cables
to
the
system
board.
See
the
system
board
illustration
for
your
machine
type
at
“Locating
parts
on
the
system
board”
on
page
125.
26.
Go
to
“Completing
the
FRU
replacement”
on
page
161.
138
Hardware
Maintenance
Manual
Summary of Contents for 7812
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Page 224: ...Part Number 43C3182 Printed in USA 1P P N 43C3182 ...