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What you need

  1. MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement, Lower Case: step 1, image 1 of 1
    • Remove the following P5 pentalobe screws securing the lower case to the MacBook Pro:

    • Eight 3.0 mm

    • Two 2.3 mm

  2. MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement: step 2, image 1 of 1
    • Lifting from the edge nearest the clutch cover, lift the lower case off the MacBook Pro.

    • Set the lower case aside.

  3. MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement, Battery Connector: step 3, image 1 of 1
    • Peel back the warning label covering the battery connector.

  4. MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement: step 4, image 1 of 2 MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement: step 4, image 2 of 2
    • Using the flat end of a spudger, gently pry the battery connector straight up out of its socket on the logic board.

    • Bend the battery cables back and out of the way, ensuring that the battery connector doesn't accidentally make contact with the logic board.

  5. MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement, I/O Board Cable: step 5, image 1 of 3 MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement, I/O Board Cable: step 5, image 2 of 3 MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement, I/O Board Cable: step 5, image 3 of 3
    • Using the flat end of a spudger, pry the I/O board cable straight up out of its socket on the I/O board.

    • In a similar fashion, remove the I/O board cable from its socket on the I/O board.

  6. MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement: step 6, image 1 of 1
    • Remove the I/O board cable from the MacBook Pro.

Conclusion

To reassemble your device, follow these instructions in reverse order.

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Brett Hartt

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