Ours had a wooden frame face. There were screws underneath the wooden buttons on the frame face - and for any of those buttons that I have had to remove all I did was use a small screwdriver to try and wedge underneath the edge next to the frame and pop them up. Usually we’re held in with a dab of silicone.
And IIRC - there may have been a screw either side, top or bottom away from where those buttons were that had to be removed. You could see them as a result of the curvature of the crt and tv case (I’m assuming your trying to remove a crt).
Once the frame was removed, the tv was held in place by a couple of screws thru the base and into the bottom of the cabinet.
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