Lenovo 10KW User Manual page 72

CAUTION:
The heat sink and fan assembly might be very hot. Before you open the computer cover, turn off the
computer and wait several minutes until the computer is cool.
To replace the heat sink and fan assembly, do the following:
1. Remove any media from the drives and turn off all connected devices and the computer. Then,
disconnect all power cords from electrical outlets and disconnect all cables that are connected to the
computer.
2. Remove the computer cover. See "Removing the computer cover" on page 48.
3. Lay the computer on its side for easier access to the system board.
4. Locate the heat sink and fan assembly. See "Computer components" on page 5.
5. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system
board.
6. Loosen the four screws that secure the heat sink and fan assembly to the system board in the following
sequence:
a. Partially remove screw
b. Partially remove screw
Note: Carefully remove the four screws from the system board to avoid any possible damage to the
system board. The four screws cannot be removed from the heat sink and fan assembly.
Figure 29. Removing the heat sink and fan assembly
7. Lift the failing heat sink and fan assembly off the system board.
Notes:
• You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.
• Do not touch the thermal grease while handling the heat sink and fan assembly.
8. Position the new heat sink and fan assembly on the system board so that the four screws are aligned
with the holes in the system board. Ensure that the heat sink and fan assembly cable faces toward the
microprocessor fan connector on the system board.
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Lenovo S510 User Guide
1 , fully remove screw 2
3 , fully remove screw 4
, and then fully remove screw
, and then fully remove screw
1 .
3 .