The March 2015 update of Apple's 13" MacBook Air features fifth generation Intel Core i5 and i7 processors, resulting in slightly increased performance and battery life.

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Could a damaged I/O Board prevent the MacBook from booting?

My Macbook Air suddenly turned off with 75% battery life and hasn't turned on ever since. It hasn't suffered any damage from falls and it has all of its original parts. I also ruled out any software problems. I considered the problem being the Logic Board hardware, but I also noticed other strange things. The charger LED turns orange as if it was charging, but it never finishes charging the battery. Therefore, the battery is not charging. Also, the computer won't turn on after I disconnected the battery and only connected the charger. Could a faulty I/O Board have caused a well-functioning Macbook Air to shut down without warning and not reboot? Also, since the battery isn't charging, could the problem only be the I/O Board? Or could it be the Logic Board? Or both?

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Does the magsafe light go green then orange again when you press the power button (with charger plugged in)?

A DC-IN (Magsafe) board can cause it not to turn on, though it can also be the logic board too.

In most cases it is caused by liquid damage on the board, and most of it can only be seen under a microscope.

You will probably have to end up taking it to someone that repairs liquid damaged Macbooks as they know how to diagnose problems like this well.

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The magsafe light stays orange. Nothing happens when I press the power button. The orange light stays orange and never goes back to green. It's only green when I initially connect the charger, but then turns orange and stays orange.

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