Replacing
the
system
board
(Types
7393,
7394,
and
7395)
Note:
When
replacing
the
system
board
a
new
retention
module
for
the
microprocessor
heat
sink
is
required.
Make
sure
you
have
a
new
retention
module
before
beginning
this
procedure.
1.
Remove
both
side
covers.
See
“Removing
the
covers”
on
page
84.
2.
Lay
the
computer
on
the
right
side
to
make
the
system
board
accessible.
3.
Remove
any
adapter
cards
installed
in
the
PCI
connectors.
See
“Replacing
a
PCI
adapter”
on
page
91.
4.
Carefully
take
note
of
the
location
of
all
cable
connections
on
the
system
board
and
disconnect
all
cables.
See
“Identifying
parts
on
the
system
board”
on
page
87.
5.
Remove
the
screws
that
secure
the
system
board
to
the
chassis.
6.
Lift
the
system
board
out
of
the
chassis.
7.
Remove
the
memory
modules
from
the
failing
system
board
and
install
them
in
the
same
location
on
the
new
system
board.
8.
Remove
the
four
screws
1
securing
the
heat
sink
and
fan
assembly
to
the
system
board.
9.
Lift
the
heat
sink
and
fan
assembly
off
the
failing
system
board.
Lay
the
heat
sink
on
its
side
so
that
the
thermal
grease
does
not
come
in
contact
with
anything.
94
Lenovo
3000
J
Series
Содержание 7387
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