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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 44), and then remove the following components:
a. Service cover (see
WLAN module on page 48)
b. Keyboard (see
Keyboard on page 58)
c. Top cover (see
Top cover on page 68)
d. System board (see
System board on page 74)
Remove the heat sink:
1. Turn the system board upside down, with the front toward you.
2. Loosen the captive screws (1) that secure the heat sink to the system board.
NOTE: The number of screws used to secure the heat sink to the system board varies by
computer model.
NOTE: Due to the adhesive quality of the thermal material located between the heat sink and
system board components, it may be necessary to move the heat sink from side to side to
detach it.
3. Remove the heat sink (2).
NOTE: The thermal material must be thoroughly cleaned from the surfaces of the heat sink and the
system board components each time the heat sink is removed. Replacement thermal material is
included with the heat sink and system board spare part kits.
The following illustration shows the replacement thermal material locations on a computer model
equipped with an AMD processor and a graphics subsystem with discrete memory. Thermal paste is
used on the processor (1) and the heat sink section (2) that services it.
Component replacement procedures 79