Introduction
Prereq only.
Tools
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Use the flat end of a spudger to pry and disconnect the three antenna cable connectors from the AirPort board.
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Connect the long-sleeved cable to the center socket.
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The short-sleeved cable connects next to the screw.
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The remaining cable has no sleeve, and connects in the last empty socket, next to the fan.
 
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Wedge a plastic opening tool between the AirPort board (side nearest the I/O ports) and the I/O board.
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Gently pry the AirPort board upwards, but do not remove it.
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.