I have my head rests hooked up to switched power and to the head unit. They function and work awesome! They play video from the dvd and sd card just fine. When I switch to radio though the headrests go blue and show no signal. Is there a setting on the HU that I can change so that what is seen on the HU during the radio source will also displays on my head rest? Or, is this just not an option with this pioneer head unit? Any help would be appreciated!