I have had the Pioneer DEH P780MP head unit for over two years now and it worked great untill now. The head unit only displays the colorful screen (with the artist name and song) when it is ejected/ slanted down so that a cd can be inserted. When I hit eject to go back to the normal position the entire screen goes black, but the music still plays. When I eject it while it is hooked up to my ipod, the colorful screen will reappear. I tried cleaning it and that did not help. How do I fix this?