Lenovo M57e - ThinkCentre - 9481 Hardware Maintenance Manual page 106

12. Lift the heat sink and fan assembly off the failing system board. Place the heat sink on its side so that the
thermal grease does not come in contact with anything.
13. Remove the microprocessor from the failing system board. See "Replacing the microprocessor" on
page 100.
14. The failing system board must be returned with a microprocessor socket cover to protect the pins during
shipping and handling. Install the microprocessor socket cover removed from the new system board on
the failing system board. To install the microprocessor socket cover:
a. Make sure the microprocessor has been removed from the microprocessor socket, and then close the
microprocessor retainer and lock it into position with the small handle.
b. Insert the tabs 1
of the socket cover downward until the tabs
98
ThinkCentre Hardware Maintenance Manual
of the socket cover into the hinged side of the socket, and then press the other side
2 snap into position.