You really need to check your video connections. It sounds like you have the sound cables connected properly, but not the video cables. Are you using the component connection (blue, green, red, white, red) or RCA (yellow, white, red)?? Make sure the color coded ends are plugged into the right places. If you've done this then your display is shot and you'll need to get your warranty paperwork out or call a local repair shop. Good luck!!