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Use this guide to replace the I/O board cable.
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   crwdns2935267:0crwdne2935267:0P5 Pentalobe Screwdriver Retina MacBook Pro and Air$5.99- 
                     
            Use a P5 Pentalobe driver to remove ten screws securing the lower case, of the following lengths: 
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            Two 9 mm screws 
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            Eight 2.6 mm screws 
 
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            Wedge your fingers between the display and the lower case and pull upward to pop the lower case off the Air. 
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            Remove the lower case and set it aside. 
 
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            Grab the clear plastic pull tab attached to the battery connector and pull it parallel to the board toward the front edge of the Air. 
 
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            Use the flat end of a spudger to pry the I/O board cable connector up out of its socket on the I/O board. 
 
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            Carefully peel the I/O board cable from the adhesive securing it to the top of the fan. 
 
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            While gently pulling the I/O board cable upward near its connection to the logic board, use the flat end of a spudger to pry up on alternating sides of the connector to help "walk" it out of its socket. 
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            Remove the I/O board cable. 
 
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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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