9. Grasp the system board at its midpoint (1) and lift the right side (2) up. Then remove the system
board (3) from the base enclosure.
Reverse the procedure to install the system board.
Heat sink assembly
NOTE: The heat sink assembly spare part kit includes replacement thermal material.
Description Spare part number
Heat sink assembly 515099-001
Before removing the heat sink assembly, follow these steps:
1. Shut down the device. If you are unsure whether the device is off or in Hibernation, turn the device
on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the device.
3. Disconnect the power from the device by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the device.
4. Remove the battery (see
Battery on page 37).
5. Remove the following components:
a. Keyboard (see
Keyboard on page 40)
b. Hard drive or solid-state drive (see
Mass storage devices on page 42)
c. Top cover (see
Top cover on page 45)
d. WLAN module (see
WLAN module on page 48)
Remove the heat sink assembly:
1. Remove the two Phillips PM1.6×2.5 screws (1) that secure the heat sink assembly to the system
board.
Component replacement procedures 57
