Removing the screws on the front trim frame and getting it out of the way, will give you a good view of what you have to do next. I've replaced a few, and found that each were blocked in by different pieces of lower out of sight wood trim pieces. But no experience with your model.
Our bedroom TV cabinet now has more storage shelves. I had two matching cabinet doors made. Ours is in a cornet cabinet, and we will mount a smaller LCD TV on an arm that can swivel out of the way to get access to the cabinet doors. (But two years now, and neither I or the DW miss not having the TV. We sometimes stream on a tablet, but very seldom.)
I've seen one gent that had shelves made, and cabinet doors. On one of the cabinet doors he had stronger hinges added, and mounted the LCD to that side of cabinets. (Offset so it overlapped the other door, and leaving enough room so that he can open the door with the TV on it, and the other door too - for almost full access to the stuff in the cabinets.) (Sorry I described that poorly - but I know what I want
!)
Best of luck to you,
Smitty