Lenovo ThinkCentre M55e Hardware Maintenance Manual - Page 101

Replacing, microprocessor

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Replacing the microprocessor Important Do not touch the gold contacts on the bottom of the microprocessor. When handling the microprocessor, touch only the sides. Turn off your computer for at least one hour before removing the microprocessor to allow the thermal grease between the microprocessor and the heat sink time to cool down. 1. Open the computer cover. See "Opening the cover" on page 83. 2. Pivot the drive bay assembly upward to gain access to the microprocessor. 3. Remove the heat sink from the system board by pivoting the lever 1 until it is fully in the vertical position. Carefully lift the heat sink off of the system board. Note: Place the heat sink on its side on a clean, flat surface so the thermal grease on the bottom of the heat sink does not touch the surface and become contaminated. Chapter 8. Replacing FRUs 95

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Replacing
the
microprocessor
Important
Do
not
touch
the
gold
contacts
on
the
bottom
of
the
microprocessor.
When
handling
the
microprocessor,
touch
only
the
sides.
Turn
off
your
computer
for
at
least
one
hour
before
removing
the
microprocessor
to
allow
the
thermal
grease
between
the
microprocessor
and
the
heat
sink
time
to
cool
down.
1.
Open
the
computer
cover.
See
“Opening
the
cover”
on
page
83.
2.
Pivot
the
drive
bay
assembly
upward
to
gain
access
to
the
microprocessor.
3.
Remove
the
heat
sink
from
the
system
board
by
pivoting
the
lever
±1²
until
it
is
fully
in
the
vertical
position.
Carefully
lift
the
heat
sink
off
of
the
system
board.
Note:
Place
the
heat
sink
on
its
side
on
a
clean,
flat
surface
so
the
thermal
grease
on
the
bottom
of
the
heat
sink
does
not
touch
the
surface
and
become
contaminated.
Chapter
8.
Replacing
FRUs
95