7. Remove the heat sink (3) and system board by sliding them up and to the left at an angle.
Reverse this procedure to install the system board.
Heat sink
Description Spare part number
Heat sink (includes replacement thermal material and 4 captive screws, secured by C-clips) 768022-001
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 keyboard/top cover (see Keyboard/top cover on page 27), and then remove
the following components:
a. Battery (see Battery on page 31)
b. WLAN module (see WLAN module on page 34)
c. Fan (see Fan on page 37)
d. Audio/USB board (see Audio/USB board on page 36)
e. Speakers (see Speakers on page 38)
f. Display assembly (see Display assembly on page 40)
g. System board (see System board on page 47)
Remove the heat sink:
Heat sink 49
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