To connect your Xbox 360 console to your high-definition TV (HDTV):
1. Turn off your console.
2. If another AV cable (such as the component HD AV cable) is already connected to the AV port on your console, disconnect it before continuing.
3. Connect the HDMI AV cable connector to the HDMI AV port (not the standard AV port) on the console.
4. Connect the other end of the HDMI AV cable to the HDMI input on your TV.
5. Turn on your console. From My Xbox, System Settings, select the appropriate high definition video setting for your TV.