Things You'll Need
Instructions
Ensure the console is powered off then unplug the composite cable from your console&'s A/V port.
Plug your component cable&'s Xbox 360 plug-in into the console&'s A/V port, where the composite cable was previously connected.
Turn the switch on the cable&'s A/V end to "HD" mode.
Connect the component cable&'s TV inputs into your HD TV. Each of the five inputs is color-coded, allowing you to match each colored input into its corresponding plug-in on the TV.
Turn on your HDTV and select the component input.
Turn on your Xbox 360 then go to the dashboard&'s "System Settings" menu.
Choose "Console Settings" from the next menu then select "Display." This is where you can edit the Xbox 360&'s picture settings, including HD.
Choose "HDTV Settings" then select the highest resolution specified on your TV.