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
the following components:
a.
Battery (see
)
b.
)
c.
)
d.
Audio/USB board (see
)
When replacing the system board, be sure that the heat sink (see
) and the memory
) are removed from the defective system board and installed on
the replacement system board.
Remove the system board:
1.
Release the ZIF connector (1) to which the power button board cable is attached, and then disconnect
the power button board cable from the system board.
2.
Release the ZIF connector (2) to which the hard drive cable is attached, and then disconnect the hard
drive cable from the system board.
3.
Disconnect the power connector cable (3) from the system board.
4.
Remove the six Phillips PM2.4×5.7 screws (4) that secure the system board to the bottom cover.
5.
Flex the left side of the bottom cover (1) until the heat sink has clearance for release.
6.
Lift the left side of the heat sink (2) and system board until it rests at an angle.
48
Chapter 5 Removal and replacement procedures
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