I recently got an Xbox v 1.1 and it worked for about a week. After cleaning it up and testing a few points to make sure things like caps didn't need replacing my psu stopped giving power to all the lines except the purple 3.3v line. It randomly let's me power it on and one of two things happen: 1.) The green light powers on for a second or two and then it shuts off. 2.) It flashes orange for about 2-5 seconds before powering off. It isn't consistent and only lets me power it on randomly. Any pointers on where to start looking on the psu before I start taking things apart further? Or is it possible it could be due to a fault on the main board that you guys know a little about?