Tv removal bedroom 396 land yacht

[Cardsstan6]

I have been trying to remove the old Sony tv from the bedroom in our 2002 land yacht and am having difficulty get it to move. I have taken out the front two screws, looked underneath for screws and found none,looked behind in the sliding door pocket and see nothing. It will lift slightly but not slide out like the front one did. This is all original eguipment and it needs and upgrade. I bought the home in the fall of 17 and have been doing service and maintenance since I bought it and this is next on the list. Any info is appreciated. Thanks.