Q: I have 40inches Sharp tv and it 1080p.
A: You need HDMI cable to get the 1080p HD that you are looking for :-) If your Xbox 360 does NOT have a HDMI input, tough luck buddy. :-( Because you won't get 1080p HD resolution. You may want to consider selling your console and buy an Xbox 360 with HDMI input or buy a PS3 for a change. :-) You may get 420p like the guy above me said when you use the HD-AV cable. If your Xbox 360 has HDMI input, well, you're in luck! You just need to buy HDMI - HDMI cable and your all set! If you're buying an HDMI-HDMI cable, don't buy a $60.00 one. Just buy those HDMI - HDMI cables that are under $10.00. They say that if the HDMI cables are gold plated, it will give you a better picture quality, guess what... Its all a gimmick! They just say that to make money out of the people who don't know much stuffs about it.