Wondering if anyone in here would know. I connected the rear screen to my new head unit with methods I found in the forum; the screen opens and works with the remote, but i cannot get it to tv mode; or to play anything besides the menu that shows DVD, hdd, am, fm. Most of the other buttons on the remote work to take me to screen settings etc. But cannot for the life of me get it into input mode from the aux or rca line. I've got a 2009