I had a similar event happen several years ago. The TV was in a open cabinet in the upper bedroom in a fifth wheel rv. I got up in the night to use the bathroom. Going back to bed I noticed the TV was beginning to smoke. Not seeing any flames, I grabbed the tv and pulled it out without taking any time to unhook the coax or power cord. The smoke alarm went off at this time. Thru it outside and watched it until the smoke dissipated. It did not catch fire.
The next morning I took it apart and found a capacitor that had melted. It was the old CRT type. Also heard that the campground had had some type of electrical problem that night as other rv's had some damage.
ryoung