I just wrapped up a refresh of the front overhead entertainment system in my '93 Itasca Suncruiser. It's fairly basic, but I think it's a good start.
During my research phase of the project, I went back and forth as to if I should do a DC-powered TV or a 110V and if I should do a stand-alone DVD or BluRay or a combo DVD-TV unit, and if I went with a stand-alone player, if that player should also be the stereo/radio/CD-player/Bluetooth sound system. In the end, I wound up with an AC/DC 24" TV-DVD from Axess ($160 from Amazon) and a Magnadyne RV5090 ($125 from Amazon).
Getting the old CRT TV out was easy. We were driving down the road and it just fell out. It nearly killed one of our dogs -- he had been lying in the exact spot not five minutes before -- and caused a bit of a code brown moment for me. I have no idea if it worked before because I never bothered to try to turn it on, but it went into the dumpster after that. I also chucked the VCR that was up there. With the TV gone, I had a gaping hole over the cockpit and I had a few different ideas. At first, I wanted to mount the TV on an arm above the "rear" seat at the dinette, but I was concerned about anchoring in to the wall and the shower was on the other side, so putting a plate there wasn't going to be easy. In the end, I decided to mount the TV over the hole. After pulling off the trim around the cavity, I screwed in wood supports from the back side to make a mounting surface that was flush with the front of the cabinetry. Having access to the area under the front cap was important to me so I can check for water intrusion and to get to the wiring, so I mounted a VESA mounting arm to a bit of 3/4" plywood and then used some aluminium clips screwed to the plywood and the mounting surface so that the whole TV mount system could be lifted off to gain access. The articulating arm allows me to get in to the cabinets and gives me the ability to change the angle of the TV.
For sound, I connected the headphone jack from the TV to the rear aux-in port on the Magnadyne. I had a problem with the speakers, though, since the original TV's output was mono and the split to go to the left and right speakers is somewhere in the ceiling. I ran a new pair of wires to the right speaker through the cabinets and this brings me to my next point: Wire colors. I've build a couple automotive wiring harnesses in my time, and I've worked with trailers and car audio and all sorts of stuff. I've always been able to trace wires so easily because I, and the manufacturers before me, choose a different color wire for each function. Injector Bank 1 +12V is purple-green, IAT signal is red-yellow, running lights are brown, etc etc etc. Some genius at Winnebago decided that was just far too much work so everything in the house 12V system is either green or purple. Bar none, the dumbest thing they could do, and a real PITA when you're trying to add things or troubleshoot.
Anyway.... Once that was sorted out, I built a box out of 1/2" plywood which I mounted inside the smoked-glass-door cabinet above the passenger seat and then mounted the Magnadyne in there. I pulled 12V power from the 12V outlet that was installed in the ceiling above the cockpit by tapping in to the purple and green wires (green's ground in that case, btw), and hardwired the radio but put in a 12V outlet in the old TV compartment for the new TV.
Works like a champ, however, I need some sort of solution around RF interference from the fluorescent lights. I'm guessing that I'm on the same circuit as the lights and they cause the screen to flicker something fierce. Long term, I'm going to replace the bulbs (and probably the 80s-tastic fixtures) with something LED, but for now I just turn the lights off. There's no need for an inverter and I don't need to run the generator or be plugged in to watch TV or DVDs. Plus I have an HDMI cable coiled up behind the TV that I can use to connect to my laptop. To finish it up, I'm going to cut off the extraneous bracketry that extends above the TV and I'm going to cut up the trim that I pulled off of the TV cavity and re-attach it to the mounting plywood to finish out the look a bit. (ignore that wire hanging down, I left my worklight up there by accident before I took the picture)
(apparently, my photo is too big for the forum to handle, and I can't hotlink it, so:
http://putrescence.org/piwigo/_data/i/upload/2017/01/22/20170122103409-16d4815e-me.jpg)