Hello, I wonder if some one can assist. I have a Pioneer HD3 set up and recently bought a Pioneer XDV-P6. This a separate DVD, CD player etc. Both units have an IP Bus and the AV Bus. It comes up on the HD3 as Ext1. The sound of the DVD comes through the car speakers and I can control changing discs etc from the HD3 head unit. I am unable to get video to display on the screen. I can get it to work if I connect a video out RCA from the XDV to the video RCA input on the HD3. I have altered the AV feed to external on the Head unit but still no success. There is a video signal coming through the a