Things You'll Need
Instructions
Unplug any previous video cables from the rear of the Xbox 360 console. Connect one end of the HDMI cable to the Xbox 360, plugging it into the HDMI port on the back of the machine.
Take the other end of the HDMI cable to the LCD TV. Locate the HDMI port on the the TV and plug in the HDMI cable. The Xbox 360 video and sound output will now be displayed on the "HDMI" output channel of the LCD TV.
Power on the Xbox 360. Select "My Xbox" then "System Settings" and press the "A" button. Select "Display Settings" and select the resolution (up to 1080p) that you wish to use with your LCD TV. The console will restart and begin displaying video at high resolutions using the HDMI cable.