Things You'll Need
Instructions
Turn off the Xbox 360, and disconnect all video connections.
Connect one end of the HDMI cable to the "HDMI" port on the back of the Xbox, and the other end to the "HDMI" port on the TV (usually on the back or side).
Set your TV to its "HDMI" input mode using the "Input" or "Source" button on its remote control. Turn on the Xbox. Scroll to "My Xbox," and select "System Settings." Select "Console Settings," then "Display."
Select "Screen Resolution," and choose the resolution that looks best on your TV.