9.
Remove the system board (3) by sliding it up and to the right at an angle.
Reverse this procedure to install the system board.
Heat sink
NOTE: The system board spare part kit includes replacement thermal material.
Description Spare part number
For use only on computer models equipped with a graphics subsystem with discrete memory 746658-001
For use only on computer models equipped with a graphics subsystem with UMA memory 746659-001
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 40), and then remove the following components:
a. Service cover (see
Service cover on page 41)
b. Hard drive (see
Hard drive on page 42)
c. Optical drive (see
Optical drive on page 50)
d. Keyboard (see
Keyboard on page 52)
e.
Top cover (see
Top cover on page 55)
Component replacement procedures
73
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