i have a kenwood kvt-819dvd player and i have hooked up the alpine dual monitor package and i cant get anything to display on the alpine monitors, just a blue screen. i have hooked them up the same way as the jensen i had and nothing. the guy from sonic electronix told me i had to go set them up through the menus in the kenwood, but i still cant get a picture. please help and any input will be much appreciated.