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The April 2014 update of the 11" MacBook Air packs refreshed dual-core i5 and i7 Haswell processors and slightly increased battery performance.

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MacBook Air wont turn on unless plugged to charger

So im having this issue with my MacBook Air early 2014.

It won´t turn on unless plugged in to the charger and after booting up, i can unplug the charger and it will work fine.

  • already reset SMC
  • Restore OS via USB
  • Tried new battery

Issue persists.

Any help will be thanked!

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That points to a logic board issue at charging/main power circuit. Usually that comes from a liquid damaged Mac or a poor quality aftermarket charger. One way or the other it would need component level repair or a logic board replacement.

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obviously i need a component repair, thats why im asking where to start looking. No water damage neither cheap aftermarket charger used...

Both batteries are OEM, replacement was pulled from another MacBook

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If there are not obvious related causes you may try with a I/O board and relevant flat cable replacement to start with. If that doesn't help you'd need to start probing U7100 and relevant circuitry, then SMC.

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Though I had 100% charge on my battery, my Macbook Air 2013 won’t turn on without connection to the power adapter. It would turn off when unplugged. I did as suggested - PRAM reset and SMC resets but the problem persisted. Figured I had to buy a new battery, even when running a Apple Diagnostis said my device has no problems. I decide to practice removing the old batteries and putting them back so I know what to do when the new batteries came. Interestingly, disconnecting the battery from the logic board and reconnecting solved the problem of needing a power adapter to run. My unit now works pretty well….

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