Heat sink, Description Spare part number

Heat sink

Description	Spare part number

Heat sink (includes a heat sink clip and replacement thermal material)	453998-001

Thermal Material Kit	445853-001

Before removing the heat sink, follow these steps:

1. Shut down 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 all external devices connected to the computer.

3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.

4. Remove the battery (see Battery on page 37).

5. Remove the following components:

a. Hard drive (see Hard drive on page 41)

b. Optical drive (see Optical drive on page 48)

c. Keyboard (see Keyboard on page 50)

d. Switch cover (see Switch cover on page 52)

e. Display assembly (see Display assembly on page 54)

f. Top cover (see Top cover on page 59)

g. Bluetooth module (see Bluetooth module on page 65)

h. System board (see System board on page 69)

i. Fan (see Fan on page 75)

Remove the heat sink:

1. Remove the two Phillips PM2.0×6.0 shoulder screws (1) that secure the heat sink and the heat sink retention clips to the system board.

2. Remove the heat sink retention clips (2) by sliding them to the left.

Component replacement procedures 77

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