My MacBook Air has suddenly stopped charging properly. When I plug in the charger, the light goes on, green at first for about 2 seconds, then to orange as per normal. However, after about 1 minute, the light goes off and it stops charging. If I unplug the charger at the wall and plug it back in, or disconnect the two halves of the power adapter and reconnect them, it starts charging again. It will once again stop after about 1 minute. I can do this indefinitely and the same thing happens every time, this has been going on nearly 2 weeks. I have tried multiple plugs and multiple chargers - same thing happens on all. I've reset the SMC (multiple times) with no luck. This is massively frustrating, please if anyone has any solutions let me know.