触控板预备步骤

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Remove the trackpad

Swing the screen open slightly, but keep the MacBook upside-down. The trackpad should separate and lay flat on the display.
As you remove the trackpad, be very careful not to lose the six small metal washers resting on the screw posts. (They will fly off and get lost with very little provocation.)
Carefully feed the trackpad's ribbon cable through its slot in the frame.

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