The orange battery light would flash, not the green one.

But that's a side note.
Not a second ago I tried holding the power button down for six seconds, and after about two, it turned on, and had some type of reboot thing, I think. That's really weird. It's been months since the laptop has turned on. The CD drive still has trouble opening, though.
Haha, weird. I don't know what to do know...