I have 07 Lexus GS350 with CD Navigation system and DVD player factory and was wondering if there is a hack a dvd player to my Navi Screen ... When i play a dvd I can hear the sound but cannont see a picture. Also I cannot drive and use the navi, Im pretty sure this is related to a ground wire solution. Can somone help with a tech who can solve this for me. I am in the ATLANTA area.. Thanks