5. Thoroughly clean the thermal material from the surfaces of the fan/heat sink assembly and the system
board components each time the fan/heat sink assembly is removed. Replacement thermal material is
included with the fan/heat sink assembly and system board spare part kits. The following illustration
shows the replacement thermal material locations.
Thermal paste is used on the processor (1) and on the fan/heat sink assembly area (2) that services it.
Reverse this procedure to install the fan/heat sink assembly.
Sensor board cable
To remove the sensor board cable, use this procedure and illustration.
NOTE: The sensor board cable is available in the Cable Kit, spare part number M20835-001.
Before removing the sensor board cable, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 44).
2. Remove the bottom cover (Bottom cover on page 44).
3. Remove the battery (see Battery on page 45).
4. Remove the system board (see System board on page 61).
Remove the sensor board cable:
1. Turn the system board upside down with the rear toward you.
2. Release the ZIF connector (1) to which the sensor board cable is connected, and then disconnect the cable
from the system board.
3. Release the ZIF connector (2) to which the sensor board cable is connected, and then disconnect the cable
from the sensor board.
66 Chapter 5 Removal and replacement procedures for authorized service provider parts ENWW
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