Another member here, had bought a Magnavox 32" LCD/LED screen for his coach and was pretty happy with it so I took a look at one when I was out screen shopping. The Magnavox had the best picture in the stores I visited so I bought it.
It draws 32 watts in broadcast TV mode. I power it with a Xantrex inverter. Any small pure sine inverter would work. Signal is received through a DIY UHF antenna I built that attaches to the side of my TT. I sometimes use my onboard 120v stereo system and speakers, the "Mic" jack from the screen outputs the audio.
Good luck with the screen hunt.