Lenovo ThinkCentre M50e, Hardware Maintenance Manual

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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.
11. Lower the handle until it is fully in the down position and locked into the
socket. This secures the microprocessor in the socket.
12. Remove the cleaning pad from its package and use the cleaning pad to wipe
the thermal grease from the bottom of the heat sink.
Notes:
a. The cleaning pad and thermal grease are separate FRUs and are not
included with the system board or microprocessor FRUs. These must be
ordered separately and shipped along with the FRUs being replaced.
b. Be sure that all of the thermal grease is removed.
Note: 0.01ML is one tick mark on the syringe. If the grease is properly
applied, approximately half (0.22ML) of the grease will remain in the
syringe.
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Hardware Maintenance Manual