Replacing
the
system
board
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
came
with
your
computer.
To
obtain
a
copy
of
the
ThinkCentre
Safety
and
Warranty
Guide
,
go
to:
http://www.lenovo.com/support
CAUTION:
The
heat
sink
and
microprocessor
might
be
very
hot.
Turn
off
the
computer
and
wait
three
to
five
minutes
to
let
the
computer
cool
before
opening
the
computer
cover.
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
the
computer
covers.
See
“Removing
the
computer
cover”
on
page
86.
2.
Lay
the
computer
on
its
side
for
easier
access
to
the
system
board.
3.
Remove
any
adapter
cards
installed
in
the
PCI
connectors.
See
“Replacing
a
PCI
adapter
card”
on
page
92.
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
85.
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.
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.
9.
On
the
new
system
board,
release
the
lever
securing
the
microprocessor
retainer
and
then
pivot
the
retainer
until
it
is
fully
open.
Note:
There
will
be
a
black
plastic
cover
on
the
microprocessor
retainer
to
protect
the
socket
on
the
new
system
board.
Remove
the
black
plastic
cover
and
place
it
on
the
microprocessor
socket
of
the
failing
system
board
when
you
complete
this
procedure.
10.
Holding
the
microprocessor
with
your
fingers,
position
the
microprocessor
so
that
the
notches
on
the
microprocessor
are
aligned
with
the
tabs
in
the
microprocessor
socket
on
the
new
system
board.
Important
To
avoid
damaging
the
microprocessor
contacts,
do
not
tilt
the
microprocessor
when
installing
it
into
the
socket.
11.
Lower
the
microprocessor
straight
down
into
the
system
board
socket
of
the
new
system
board.
102
Lenovo
E200
Hardware
Maintenance
Manual
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