Dell PowerEdge T20 Owner's Manual page 54

Figure 25. Removing and Installing the Heat-Sink Assembly
1. processor fan
3. processor fan cable
5. screw sockets (4)
CAUTION: The processor is held in its socket under strong pressure. Be aware that the
release lever can spring up suddenly if not firmly grasped.
9. Position your thumb firmly over the processor socket-release lever and release the lever from the
locked position by pushing down and out from under the tab. Rotate the lever upwards until the
processor shield is open.
CAUTION: The socket pins are fragile and can be permanently damaged. Be careful not to
bend the pins in the socket when removing the processor out of the socket.
10. Lift the processor out of the socket.
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2. captive screws (4)
4. heat sink