Lenovo ThinkCentre A50 Hardware Maintenance Manual - Page 105

microprocessor.

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10. To remove the microprocessor 1 from the failing system board, lift the small handle 2 on the microprocessor socket to its maximum vertical position. Carefully lift the microprocessor off the socket. 11. To install the microprocessor on the new system board, position the microprocessor socket handle on the new system board to the full vertical position. Otherwise the microprocessor pins might be damaged when reinstalling the microprocessor. 12. Position the microprocessor so that the pins are aligned with the socket and with the beveled corner 1 on the microprocessor is aligned in the socket as shown. 13. Lower and lock the handle to secure the microprocessor in the socket. Note: Do not install the heatsink until the new system board has been installed. 14. Install the new system board and tray into the rear of the chassis until it is fully seated. 15. Reinstall the PCI riser. 16. Reinstall the memory modules. 17. Reinstall the heat sink on the microprocessor. 18. Reconnect all cables to the system board. See "Identifying parts on the system board" on page 92. 19. Reinstall the rear fan bracket assembly and connect the fan cable to the system board. Chapter 8. Replacing FRUs 99

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10.
To
remove
the
microprocessor
±1²
from
the
failing
system
board,
lift
the
small
handle
±2²
on
the
microprocessor
socket
to
its
maximum
vertical
position.
Carefully
lift
the
microprocessor
off
the
socket.
11.
To
install
the
microprocessor
on
the
new
system
board,
position
the
microprocessor
socket
handle
on
the
new
system
board
to
the
full
vertical
position.
Otherwise
the
microprocessor
pins
might
be
damaged
when
reinstalling
the
microprocessor.
12.
Position
the
microprocessor
so
that
the
pins
are
aligned
with
the
socket
and
with
the
beveled
corner
±1²
on
the
microprocessor
is
aligned
in
the
socket
as
shown.
13.
Lower
and
lock
the
handle
to
secure
the
microprocessor
in
the
socket.
Note:
Do
not
install
the
heatsink
until
the
new
system
board
has
been
installed.
14.
Install
the
new
system
board
and
tray
into
the
rear
of
the
chassis
until
it
is
fully
seated.
15.
Reinstall
the
PCI
riser.
16.
Reinstall
the
memory
modules.
17.
Reinstall
the
heat
sink
on
the
microprocessor.
18.
Reconnect
all
cables
to
the
system
board.
See
“Identifying
parts
on
the
system
board”
on
page
92.
19.
Reinstall
the
rear
fan
bracket
assembly
and
connect
the
fan
cable
to
the
system
board.
Chapter
8.
Replacing
FRUs
99