Do you know what was replaced? Mine now has the same issue. Will not power up with charger or battery. When charger is plugged in light goes out on brick. I've pulled the board out and pulled all accessories along with CPU. I then plugged power into bare board and get same result, so there is a component on the board somewhere that has failed. Anyone have any idea which component would be suspect? I know this is an older computer, but I'd have to spend some $ to get a new one that matches the performance of this thing.
I disassembled mine to clean the fans and added thermal paste to the CPU and GPU and put it back together and now mine won't power on, looking for solutions also.