I've wired my eby701 by taking the dc power cable that came with the screen, removing the cigar lighter adapter, and tapping the positive side into the switched 12v line going to my cigar lighter. I grounded the negative wire to the car's firewall.
I figured this was ok because the power cable has a built in DC-DC regulator.

The result of this is the wire gets really hot, really fast. And I get zero power to the screen. Is there a problem with the way I wired it up?