There's just soooooo many different RV styles that many would benefit from a picture if you can manage it. Might get quicker help.
Here's the
brochure and it seems as though it came with a Tube type TV? Is yours that type? If so, those are usually held in with the wooden surround on the front of the cabinet, held by a couple wood screws. Take that off, you can see the sides of the TV. Then the TV itself can be held with a nylon ratcheting strap. When I find one like that, I just use scissors to cut the strap.
Those TVs are almost always held in in such a way at they aren't damaged by the brackets and what not, so they can be removed for repair. Not something most people do these days of 'toss everything and buy new' but they set it up for that.