So last night my G5 was running fine (fan issues from my other thread, but nothing out of the ordinary for it). I had been listening to music, chatting on-line and working on a painting, I usually leave it running over-night, but for whatever reason I decided to shut it down. It didn't have any issues shutting down or anything, so I went off to bed. This morning I got up to turn it on and get back to work, only to find out that pressing the power button didn't do anything... I tried unplugging it for a few minutes, plugging it back in, nothing. Tried a different, known good power cable, nothing. Even opened it up and tried re-seating the cable from the logic board to the power button, and still nothing. If anyone has any ideas at all, I'd be entirely grateful.