So I just installed Flash and restarted my Mac, and now it won't start. It was working perfectly before that and I didn't drop it or anything.
The power cable works (tried it on another Mac) so it's not that.
When I press the power button I see the charger loading icon and it's red (like 2mm bar) then it takes 2 seconds and the screen is black. No sound what so ever. When I plug in the power cable I can see that it changes from no cable to cable plugged in, but it won't charge or start.
What can have happened and what to do? It's a 2 year old MacBook 15" retina.