Dell OptiPlex 760 Service Manual page 185

1 top of heat sink 2 heat sink
3 retention base 4 release tab
b. Gently lift the heat sink from the processor.
c. Lay the heat sink down on its top, with the thermal grease facing upward.
CAUTION: Unless a new heat sink is required for the new processor, reuse the original heat sink assembly when you replace the processor.
5. Open the processor cover by sliding the release lever from under the center cover latch on the socket. Then pull the lever back to release the processor.
1 center cover latch 2 processor cover
3 processor 4 socket
5 release lever
CAUTION: Ground yourself by touching an unpainted metal surface on the back of the computer.
CAUTION: When replacing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket.
6. Gently remove the processor from the socket.
7. Leave the release lever extended in the release position so that the socket is ready for the new processor.
Installing the Processor
1. Unpack the new processor, being careful not to touch the underside of the processor.
2. If the release lever on the socket is not fully extended, move it to that position.
3. Orient the front and rear alignment-notches on the processor with the front and rear alignment-notches on the socket.