To make this quick and sweet, my friends sons Xbox does not work. There is a black disconnected wire, pictured below. I'm wondering if this could be the problem, and what the wire does and what it might do if I reconnect it. I do not know what the actual problem is, just that it supposedly doesn't work at all. the best I can say is is a black wire that comes out from the bottom of the box and goes up to a green circuit board on the side and just hangs free.