Lenovo ThinkCentre M55e Hardware Maintenance Manual - Page 99

microprocessor

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13. On the new system board, release the lever securing the microprocessor retainer and then pivot the retainer until it is fully open. 14. 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, do not tilt the microprocessor when installing it into the microprocessor socket. 15. Lower the microprocessor straight down into the microprocessor socket. 16. Lower the microprocessor retainer 2 and then lower the lever 1 to secure the retainer. Make sure the lever is securely locked into position. 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 as you lock the microprocessor in position. Place the black plastic cover on the microprocessor retainer of the failing system board. 17. Place the heat sink into position and lower the lever to secure the heat sink. 18. To install the new system board, tilt the front end of the system board between the diskette drive and the fan assembly, and position it so that the slots in the new system board are aligned with the pins in the chassis. Chapter 8. Replacing FRUs 93

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13.
On
the
new
system
board,
release
the
lever
securing
the
microprocessor
retainer
and
then
pivot
the
retainer
until
it
is
fully
open.
14.
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,
do
not
tilt
the
microprocessor
when
installing
it
into
the
microprocessor
socket.
15.
Lower
the
microprocessor
straight
down
into
the
microprocessor
socket.
16.
Lower
the
microprocessor
retainer
±2²
and
then
lower
the
lever
±1²
to
secure
the
retainer.
Make
sure
the
lever
is
securely
locked
into
position.
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
as
you
lock
the
microprocessor
in
position.
Place
the
black
plastic
cover
on
the
microprocessor
retainer
of
the
failing
system
board.
17.
Place
the
heat
sink
into
position
and
lower
the
lever
to
secure
the
heat
sink.
18.
To
install
the
new
system
board,
tilt
the
front
end
of
the
system
board
between
the
diskette
drive
and
the
fan
assembly,
and
position
it
so
that
the
slots
in
the
new
system
board
are
aligned
with
the
pins
in
the
chassis.
Chapter
8.
Replacing
FRUs
93