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My name is ***** ***** I will be assisting you today.
My first statement is to congratulate you on your new almost rebuilt Macbook Air 11 (That is a joke.)
My first question is to ask you what the voltage of the old and the new power adapters are?
I will be here for a while so just reply when you have a chance.
Just my opinion, from the things that I have seen over the years, that maybe this issue has accelerated other issues pertaining to power, like blowing a capacitor or frying a wire. But that would be worst case scenario.
Best case scenario, update the heck out of the machine and see if updating the firmware makes any difference.
Other than that, I would have no other ideas because you have done so wonderfully on your own.
If, by some miracle, my suggestions work - feel free to leave me a good rating on my answer so I can get credit for it.
Either way, please let us know. I'm curious as to what the answer is.
If you give stars, yes. If you want me to send this to be closed out without payment, I can do that as well. Either way, I understand. You spent a LOT on this issue and it was worth a shot. LOL
I certainly will!