Hi, I got this issue with my 2012 macbook pro. Somtimes everything works fine for months and then the problem starts out of the blue. I connect the charger and it just won't charge. The led doesn't turn on and the body of the charger is not getting any warmer. I made sure that the magsafe port and adapter are clean. I resetted SMC, tried different outlets but nothing. And then after messing around for half an hour the charger just starts working again. Any ideas what might be the problem? Thanks!