I've never really had computer problems.
Lastnite my computer was working fine. I left the room for about 20 minutes and came back and everything was shut off.
My mother's boyfriend turned it off. I tried turning it back on, but it seemed as if there was no sign of life. The little light in the back of the tower is green when I plug the a/c adapter in. But when I press the power button nothing happens.
What is the cause of this? Psu? Cpu? Motherboard?