I installed a 19" TV in my Class "C" with a built in DVD player. The TV actually sells as an AC model but uses a 12VDC converter. I replaced the converter with a 12V plug and added a 12VDC regulator to the plug to assure it did not have problems when DC voltage goes over 14V when charging. It sells for $119 at Walmart. It also has a headphone jack to allow you to connect to an external audio amplifier if you desire. It's not a big TV like a 40" model but neither is my Class "C". :B I mounted it using an articulating swivel TV mount so the TV is visible from just about anywhere in the motorhome. It is only 720P but at 19", it does not need the 1440P to look nice and clear. A friend of mine has had the same model without the DVD player for a couple of years with no problems. DVD player works fine.
12 Volt - 19" TV/DVD Combo