And this is the little magic IC that runs it all. It inputs the different video sources and converts them to the control signals for the LCD. The IR3Y29B has composite, S-Video, and RGBs inputs. The S-Video and Composite are considered one input. You could not have both. A single pin switches between RGBs (used by the navigation ECU and the compsite/S-Video input. I have attached the datasheet for this chip.