can anyone help me with this? (composite video wireing)

[DoomsdayTheory]

in my last post i was going on about my current xbox 360 mod in which i am adding a LCD screen onto the case. ive got the video composite wired into the proper pinouts on the board and everything works when the AV cable is plugged into the unit. however, when i unplug the AV cable(from the xbox to the TV not the LCD) the signal to the LCD is also cut off. is there a pin that needs to be connected in order for the video signal to be sent to the AV cable? i could post pictures when i get home of how it is wired if that will help, but im currently at work ATM and the Xbox is home tonight. i wanna say it has something to do with the 20, 22, 24, 26 pins but i dont wanna just go diggin around willy nilly on this thing untill i know for sure. thanks for any feedback

 

[Ian H]

Off memory there are switching pins on the av socket that tell the xbox what sort of cable is plugged into it, ie composite, component, vga, etc. Sorry I cant remember the sequencing but google (other search engines are available) is your friend there.
Cheers
Ian