This sounds dumb, but I can't figure out how to get audio from the DVD player on the headrests. My driver side screen says no signal (assuming it has a loose wire or something) and the passenger side plays but there is no audio. I hear they come with wireless headsets and a remote? Mine didn't come with those, is there another way to listen to dvd's (through the car stereo?). Does RR or anyone else sell replacements for the remote and headsets?