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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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MacBook totally dead after USB and HDMI insert

Hi.

Today I was setting up my mac in my office. Plugged the hdmi (with transition) in, soon after i put my usb in to charge a powerbank. Immidiately the macbook shut down completely. No response when clicking the power button. I then opened up the macbook and removed the battery, then reinstalling the battery. Then the macbook actually worked.

Then, later on, i managed to use hdmi and usb together again. The macbook shut down. I have now tried reinstalling the battery. SMC. And much more. Nothing works and the macbook is totally unresponsive.

Grateful for your help!

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Sounds like your dongle is bad! I also wouldn't use the USB ports to charge a battery pack.

At this point you'll need to do a good inspection of the logic board (both sides) looking for burn't chips or heat stains. If you see anything take a good image of the area and post it here for us to see.

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Sindre Fjellestad will be eternally grateful.
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