Have you tried taking apart the screen. It may have a VGA connector inside. My 15' inch flip down for the back was composite, when i opened it i noticed a mini port of some sort. i took it to a store and they said it looks like some type of VGA. I then got a adapter with a connector that fit the mini port and also have a standard VGA port to plug into the PC. Only issue I have is that the refresh rate has to be a 50mhz or it wont look clear. Thankfully my graphics card supports multiple refresh rates at the same time.
Other then that, nice install....
1X Ainol Novo Flame Tab
3x Perixx Touchpads
3x 7 inch Screens
1X 7 inch motorized Screen
1x Win 7 PC
Thanks for the info..
But that car and carputer is history.. (Sold my lancer)
Now driving Citroen C1 but did not install any carputer in it..