Lenovo ThinkCentre M50e Hardware Maintenance Manual - Page 119

Removing, replacing, microprocessor

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microprocessor." Continue to the next step after installing the heat sink and microprocessor on the new system board. 8. Install the new system board into the chassis and insert the screws. 9. Reconnect all cables to the system board. See "Identifying parts on the system board" on page 108. 10. Go to "Installing the cover and connecting cables" on page 116. Removing and replacing the microprocessor 1. Turn off the computer and peripheral devices and disconnect all external cables and power cords; then, remove the cover. See "Removing the cover" on page 106. 2. Remove any air baffles or ducts that cover the microprocessor. 3. Disconnect the heat sink fan cable from the system board. Refer to "Identifying parts on the system board" on page 108. 4. Loosen the two captured screws 3 holding the fan and heat sink in place, and pivot them to the side. 5. To remove the fan and heat sink 1 from the microprocessor 2 , gently twist the fan and heat sink to break the seal formed by the thermal grease and remove. Note: If the thermal grease seal cannot be broken, you may want to start up the system to heat the processor and loosen the thermal grease. 6. Place the heat sink on a clean work surface. 7. Take notice of the orientation of the beveled corner on the microprocessor. This is important when reinstalling the microprocessor on the system board. 8. Release the microprocessor from the system board by pulling outward and lifting the small handle on the microprocessor socket to its maximum vertical position. Carefully lift the microprocessor off the socket. 9. Make sure that the microprocessor socket handle is fully in the vertical position. Otherwise the microprocessor pins might be damaged when installing the microprocessor. 10. Position the microprocessor so that the pins are aligned with the socket and with the beveled corner in the correct orientation. Chapter 9. Replacing FRUs (Types 8149, 8177, and 8178) 113

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microprocessor.”
Continue
to
the
next
step
after
installing
the
heat
sink
and
microprocessor
on
the
new
system
board.
8.
Install
the
new
system
board
into
the
chassis
and
insert
the
screws.
9.
Reconnect
all
cables
to
the
system
board.
See
“Identifying
parts
on
the
system
board”
on
page
108.
10.
Go
to
“Installing
the
cover
and
connecting
cables”
on
page
116.
Removing
and
replacing
the
microprocessor
1.
Turn
off
the
computer
and
peripheral
devices
and
disconnect
all
external
cables
and
power
cords;
then,
remove
the
cover.
See
“Removing
the
cover”
on
page
106.
2.
Remove
any
air
baffles
or
ducts
that
cover
the
microprocessor.
3.
Disconnect
the
heat
sink
fan
cable
from
the
system
board.
Refer
to
“Identifying
parts
on
the
system
board”
on
page
108.
4.
Loosen
the
two
captured
screws
±3²
holding
the
fan
and
heat
sink
in
place,
and
pivot
them
to
the
side.
5.
To
remove
the
fan
and
heat
sink
±1²
from
the
microprocessor
±2²
,
gently
twist
the
fan
and
heat
sink
to
break
the
seal
formed
by
the
thermal
grease
and
remove.
Note:
If
the
thermal
grease
seal
cannot
be
broken,
you
may
want
to
start
up
the
system
to
heat
the
processor
and
loosen
the
thermal
grease.
6.
Place
the
heat
sink
on
a
clean
work
surface.
7.
Take
notice
of
the
orientation
of
the
beveled
corner
on
the
microprocessor.
This
is
important
when
reinstalling
the
microprocessor
on
the
system
board.
8.
Release
the
microprocessor
from
the
system
board
by
pulling
outward
and
lifting
the
small
handle
on
the
microprocessor
socket
to
its
maximum
vertical
position.
Carefully
lift
the
microprocessor
off
the
socket.
9.
Make
sure
that
the
microprocessor
socket
handle
is
fully
in
the
vertical
position.
Otherwise
the
microprocessor
pins
might
be
damaged
when
installing
the
microprocessor.
10.
Position
the
microprocessor
so
that
the
pins
are
aligned
with
the
socket
and
with
the
beveled
corner
in
the
correct
orientation.
Chapter
9.
Replacing
FRUs
(Types
8149,
8177,
and
8178)
113