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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MacBook air wont turn on with part plugged in

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Hi had some water damage on my maxbook air i cleaned it out with alcohal. And it boots up now when this part isnt attached. But when attached it doesnt work. Is this part important? Is there any fixes for it? Thanks.

Update: I replaced the i/o cable and now it powers on fine and the fan isnt loud anymore. But now a new problem arose. When i plug in the charger the battery doesnt charge and instead the screen goes blank. When i remove the charger it comes back on again. Any advice would be appreciated.

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That's the I/O cable, transmits data across from the charging board for audio, USB, sensor (fan will spin fast with this disconnected), the onewire circuit (to let the MacBook charge the battery) and more signals. This part is bad (most likely pins burnt), which is why it is preventing boot.

There will be a part number on this cable, search it on eBay and order another, don't try and use it without this since it is a cheap part.

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Thank you I will order the part and will update with the results.

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Update: I replaced the i/o cable and now it powers on fine and the fan isnt loud anymore. But now a new problem arose. When i plug in the charger the battery doesnt charge and instead the screen goes blank. When i remove the charger it comes back on again. Any advice would be appreciated.

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Haven't seen this problem myself, but the I/O cable deals with PP3V42_G3H (required to charge) and PP3V3_S0 (screen signal). I imagine it's a bad I/O cable or bad DC jack

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I went ahead and changed the I/O board. So now everything works as it should thank you for your help. But One thing that happens now is that when i plug in the charger the macbook turns on by itself. Its not a big issue. But is there a simple fix for this?

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This happens if the battery is disconnected, or the battery has just been reconnected. This shouldn't happen after the first boot the battery has been connected (unless it is disconnected/reconnected again).

Not sure exactly what could cause this, possibly a bad battery?

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