I am in the exact situation, the Genius bar told me to pay $500AUD, is a disaster maybe we can organize to get our refubrised for free. I had 3 months ago a battery replacement, then I did a fresh factory reset and voila... cannot activate and I have tried all the Macbook stuff/update/reinstall.
I need the device for work (run on old device and see performance changes).
Victorsoyvictor
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Aranjuez, Madrid, Spain