Got stick + 4k version few weeks ago from bestbuy. Works on my 4k tv. But on my old coby tftv1904 18.5" tv screen cutoffs. I have selected 720p in settings and its fine. Home screen looks great. Only netflix cutoffs. The main area is fine. But the side menu search, etc is cutoff. All other apps including xfinity stream beta which is what I got it for work fine. Only netflix cutoffs.
Sounds like your TV suffers from some overscan issues.. make sure your widescreen settings are set to native or full.. experiment a little until everything that should fit, does. If you can't get it to fit, you might need to invest in a better TV without overscan problems.
Yeah, I got some Rokus. https://youtu.be/d1CSEeqWl10
Thanks. Ya there is a format button but no help. Selecting (zoom : 4:3) leaves black bars on the sides. But still cuts off the left menu. But its only netflix. No other app. Xfinity stream different programs do different things. But I can live. I will buy a tv later on sale but this is good enough for now.