12. Slide the system board (2) up and to the left at an angle to remove it.
To install the system board, reverse this procedure.
Heat sink
To remove the heat sink, use these procedures and illustrations.
Table 5-13
Heat sink descriptions and part numbers
Description Spare part number
Heat sink (includes captive screws and replacement thermal material):
For use with computer models equipped with a 28 W processor N47731-001
For use with computer models equipped with an 18 W processor N07344-001
Before removing the heat sink, follow these steps:
1. Prepare the computer for disassembly (see Preparation for disassembly on page 38).
2. Remove the bottom cover (see Bottom cover on page 38).
3. Remove the battery (see Battery on page 40).
4. Remove the fan (see Fan on page 53).
5. Remove the system board (see System board on page 57).
Remove the heat sink:
1. In the order indicated on the heat sink, loosen the four Phillips captive screws (1) that secure the
heat sink to the system board.
60
Chapter 5 Removal and replacement procedures for authorized service provider parts
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