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Won't charge. Think it is some protection circuit on MacBook

Hi, so i think the 12V and GND on my macbook pro got shortet by a small piece of metal getting sucked in by the magnet.

Now my mac will not charge. I have tried with 4 different chargers.

HOWEVER it will charge if i use the cheap China charger i have in my car.

So thats why i think it could be some protection circuit or whatever that was triggered by the short to the MBP magnetic "charge area", and that the cheap china charger does not care about this safety mechanism.

Any ideas how i get charging again (besides from living in my car)?

Answered! View the answer I have this problem too

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You've gone to the right point straight away :) Chinese chargers don't have the built in logics that Magsafe have, thus push in voltage irrespective of the logic board protection circuitry. A cheap aftermarket charger will probably be working "fine" also with the ordinary house power source. However, without protection, your Mac would be more exposed to overvoltage and overpower and you'd risk frying your logic board one day or the other. You can try replacing your magsafe board..it might be the damage is limited to that part..you'll find the replacement part here on ifixit too, linked on the guide:

MacBook Pro 15" Retina Display Mid 2014 MagSafe DC-In Board Replacement

In case magsafe board replacement won't solve your issue, you'll need a technician focusing on component level repairs to fix it.

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Here's a bit more on the cheap chargers: Lacking safety features, cheap MacBook chargers create big sparks. I would strongly recommend you work on getting your system fixed it would be a shame you killed your system or worse yet have your system start a fire!

The MagSafe DC-In connector in its self won't be all you need here. I'm sure you've damaged the voltage comparator chip on the logic board.

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