We bought a Coby HDTV/AM/FM/DVD/CD under-cabinet unit. Designed for home kitchen use, it has a 12VDC "wall-wort" adapter that made it very easy to wire it into our trailer's 12V system. Coby sells this unit in a variety of screen sizes, seven to fifteen inches.
We don't watch TV much when we're out with out trailer, so the 10" screen version works just fine for us, and it draws under 2 amps when we're using the DVD/HDTV combo and even less any other time, so it doesn't tax our solar-powered electrical
I setup a nylon strap and buckle system that holds the screen in its stowed position while we're towing.