Instructions
Connect the power supply cable to your Xbox 360 and the other side to an outlet.
Connect the HDMI cable connector into the HDMI AV port on the Xbox 360, if you have an HDMI cable. Connect the other end to your TV's HDMI input. If you have the component HD AV cable, connect the AV connector into the standard AV port on the Xbox 360, and the color-coded connectors into the corresponding jacks on your TV.
Place two AA batteries in your Xbox 360 controller and turn on your TV, Xbox 360 console and the Xbox 360 controller.
Navigate to the "System" menu and then "Console Settings."
Select "Display." Select "HDTV Settings." Choose which output matches your HDTV, such as 720i or 1080p. Press "A" and confirm your choice by clicking "Yes."