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Use this guide to replace the AirPort card.
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            Remove the following ten screws securing the lower case to the upper case: 
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            Two 2.3 mm P5 Pentalobe screws 
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            Eight 3.0 mm P5 Pentalobe screws 
 
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            Wedge your fingers between the upper case and the lower case. 
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            Gently pull the lower case away from the upper case to remove it. 
 
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            Use the flat end of a spudger to lift the battery connector straight up out of its socket on the logic board. 
 
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            Wedge the tip of a spudger underneath each of the antenna cables, near their connectors and pry up to disconnect them 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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            Remove the single 2.7 mm T5 Torx screw securing the AirPort board to the I/O board. 
 
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            Lift the free end of the AirPort board up slightly and pull it straight out of its socket on the logic board. 
 
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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What happened when it says "no wifi hardware detect " after replacing airport card?
If you aware how to replace wi-fi antenna ?
