I was just wondering if the power supply fan is supposed to make any noise. When I leave my Xbox in instant-on mode, I can't sleep because the fan makes a faint sound. It's hardly loud, but my ears pick up on it and then I can't get it out of my head. It's across the room, tucked away behind my TV. Is this normal? I hear some people saying that it should be completely silent. So I'm not sure if there's something wrong with mine. I mean a fan has to make noise so I'm not sure. Really I don't know why the fan needs to be on at all if it's only supplying a little bit of power.