Hey guys, just recently bought a used xbox that was broken and immediately had it fixed. Upon it's return it will not display any image or sound when I use an HDMI cable and it won't display images or sound with the stock av component cables unless I have it set to TV. My TV just has the blank screen saying no signal with the HDMI and HD av setting. So the result is I have and Xbox that cant play in HD which looks like crap. Anyone one have any ideas as to what is the problem?