Won't turn-on with battery or cord connection.
I have problem, on a gifted A1278 2008 unibody. The system won’t turn on.
Changed the DC-In board (thanks to the wonderful guide) that looked burned, and then still nothing, after few hours the battery level was full but it still doesn’t turn on, I tried the resetting, also and no battery light on, but nothing. I’ve bought two chargers too …