I recently took apart a Sonic Impact V55 media player(iPod or AV input) and I am now messing with hooking it up to an external source without all the extra boards/speakers. I am really lost right now and know the power board(not pictured) is to the left(have power getting to the screen) but I can't get any video to come up. Unit usually has 2 inputs to choose from, could this be the problem? Any help is appreciated!