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The April 2014 update of Apple's 13" MacBook Air features refreshed dual-core i5 and i7 processors, plus slightly increased battery performance.

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replaced my I/O board and now speaker not working

Replaced my I/O board with iFixit replacement which consists of the power, USB, and headphone ports, to fix the issue I was having of my Macbook Air not charging. Good news is that it is now charging! Bad news is the speaker no longer works. I did have to disconnect the speaker connection to replace the board but did not damage it and securely plugged it back in. Is this a PRAM issue?

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As always first try and reset SMC, NVRAM and PRAM. If nothing of that is working you probably didn’t connect the speaker right or you damaged connector.

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Thanks Uros! Currently waiting for the new battery conditioning process to finish up. Will then perform the resets you mentioned and let you know.

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Resetting the PRAM fixed it thank you! did not try resetting the SMC or NVRAM.

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@koberlin1 Im happy I could help you!

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Kent O será eternamente grato(a).
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