Lenovo ThinkStation P920 Hardware Maintenance Manual page 209

®
c. Use a T30 Torx screwdriver to loosen screws
and-fan assembly from the system board.
Note: Carefully loosen the four screws to avoid any possible damage to the system board. The four
screws cannot be removed from the heat-sink-and-fan assembly.
Figure 178. Removing the heat-sink-and-fan assembly
d. Lift the failing heat-sink-and-fan assembly from the system board.
Notes:
• You might have to gently twist the heat-sink-and-fan assembly to free it from the microprocessor
socket on the system board.
• Install a microprocessor socket cover to protect the empty microprocessor socket.
Figure 179. Installing the microprocessor socket cover
4 , 3 , 2 , and 1 in sequence to release the heat-sink-
.
Chapter 9 Hardware removal and installation
201