Heat sink assembly
NOTE: The heat sink assembly spare part kit includes replacement thermal material.
Description Spare part number
Heat sink assembly (includes replacement thermal material) 738686-001
Before removing the heat sink assembly, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
Battery on page 32), and then remove the following components:
a. Service door (see
Service door on page 33)
b. Fan (see
Fan on page 44)
Remove the heat sink assembly:
1. Position the computer upside down, with the battery bay facing you.
2. Following the 1 through 4 sequence stamped into the processor heat sink, loosen the four
Phillips captive screws (1) that secure the processor heat sink to the system board.
3. Lift the heat sink assembly at an angle (2).
4. Remove the heat sink assembly (3).
NOTE: Due to the adhesive quality of the thermal material located between the heat sink
assembly and the system board components, it may be necessary to move the heat sink
assembly from side to side to detach it.
Component replacement procedures 51