Just bought myself a Pioneer Avic-F20BT (SAME AS Z110BT)and a CKO DVBT500 dvb-t with 2 x 5v powered internal aerials (the 2 prong type) . Fantastic kit and tuner is brilliant but i have the strangest of problems . I have an existing pair of rear headrest dvd/monitors and a roof monitor as well . they are connected via a signal booster to the rear monitor output of the headunit and all work brilliant with their own internal dvd players and with any of the outputs i select from the headunit , ipod , dvd in the headunit , usb , sd video in fact everything except one thing . I can have the headuni