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8.
Remove the system board (3) by sliding it up and to the left at an angle.
9. Remove the system board.
Reverse this procedure to install the system board.
Heat sink
Description Spare part number
Heat sink (includes replacement thermal material) 685508-001
Before removing the heat sink, 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 50), and then remove the following components:
a. Service cover (see
Service cover on page 52)
b. Bluetooth module (see
Bluetooth module on page 54)
c. Speaker assembly (see
Speaker assembly on page 56)
d.
Optical drive (see
Optical drive on page 57)
e. Hard drive (see
Hard drive on page 58)
f. Fan (see
Fan on page 60)
Component replacement procedures
81