I was using Firefox when my MacBook Pro crashed. I was not initially concerned, as it does this about once a month. However, it no longer starts. It had 80% battery when it crashed, and plugging it in does not help. Before I take it to the shop or take it apart, I hope someone here can offer a solution.
It is a 2013 MacBook Pro running the latest version of Yosemite.
Edit: The computer restarts after several hours, but crashes again later. I sought professional advice and was informed that the logic board needed to be replaced, because the not-restarting bit is apparently symptomatic of an overheated logic board. But the problem resumed two days after a new logic board was installed.
Best Answer
Have you ever tried to reset NVRAM or PRAM (older Mac)? With Mac turned off, power on the Mac, then press and hold CMD (⌘) + Option (⌥) + P + R until restart itself, this should take a couple of seconds. This could be find at Apple Support, Hope it helps