7.Disconnect the battery charger board ribbon cable from the system board (see Battery connector board on page 47).
8.Remove the top cover (see Top cover on page 49).
9.Disconnect the optical drive cable from the system board (see Optical drive on page 58).
10.Remove the system board (see System board on page 62).
Remove the fan/heat sink assembly:
1.Turn the system board upside down with the front toward you.
2.Disconnect the two fan cables (1) from the system board.
3.Loosen the nine captive screws (2) that secure the fan/heat sink assembly to the system board.
4.Remove the fan/heat sink assembly (3).
NOTE: Due to the adhesive quality of the thermal material located between the fan/heat sink assembly and system board components, it may be necessary to move the fan/heat sink assembly from side to side to detach it.
NOTE: The thermal material must be thoroughly cleaned from the surfaces of the fan/heat sink assembly and the processor each time the fan/heat sink assembly is removed.
●Thermal paste is used on the processor (1) and the heat sink section (2) that services it
●A thermal pad is used on the PCH chip (3) and the heat sink section (4) that services it
●Thermal paste is used on the graphics subsystem chip (5) and the heat sink section (6) that services it
Replacement thermal material is included with all fan/heat sink assembly, system board, and processor spare part kits.
66 | Chapter 4 Removal and replacement procedures |