7. Follow the following sequence to remove the four screws that secure the heat sink and fan assemblyto the system board:a. Partially remove the screw 1 , then fully remove the screw 2 , then fully remove the screw 1 .b. Partially remove the screw 3 , then fully remove the screw 4 , then fully remove the screw 3 .Note: Carefully remove the four screws from the system board to avoid any possible damage to thesystem board. The four screws cannot be removed from the heat sink and fan assembly.Figure103. Removing the heat sink and fan assembly8. Lift the 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.9. Position the new heat sink and fan assembly on the system board so that the four screws on the newheat sink and fan assembly are aligned with the corresponding holes on the system board. Ensure thatthe cable of the new heat sink and fan assembly faces toward the microprocessor fan connectoron the system board.10. Follow the following sequence to install the four screws to secure the new heat sink and fan assembly.Do not over-tighten the screws.Notes:a. Partially tighten the screw 1 , then fully tighten the screw 2 , then fully tighten the screw 1 .b. Partially tighten the screw 3 , then fully tighten the screw 4 , then fully tighten the screw 3 .11. Connect the cable of the new heat sink and fan assembly to the microprocessor fan connector on thesystem board. See “Locating parts on the system board” on page 80.Chapter 10. Replacing FRUs (machine types: 10B4, 10B5, 10B6, and 10B7) 159
