Before removing the heat sink assembly, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 26).
2. Remove the rubber feet (see Computer feet on page 26).
3. Remove the bottom cover (see Bottom cover on page 27).
4. Remove the battery (see Battery on page 28).
Remove the heat sink assembly:
1. In the order indicated on the heat sink, remove the four Phillips M2.0 × 4.0 screws (1) that secure the
heat sink to the system board.
2. Remove the heat sink (2) from the system board.
3. Thoroughly clean the thermal material from the surfaces of the heat sink and the system board
components each time the heat sink is removed. Replacement thermal material is included with the heat
sink and system board spare part kits. The following illustration shows the replacement thermal
material locations.
Component replacement procedures 45