I also have Onn and Roku stick. My pic was fine until my husband accidentally pressed buttons on the TV remote trying to figure out how to get to the DVD player. Now, my Roku screen and all apps (Netflix, Hulu, etc) are zoomed. Like the Original poster (OP), I found I could not use the TV remote only on Roku for aspect ratio, but could for everything else (TV, DVD). How do I get it back? I have tried changing the theme (many times based on other posters suggestions); reset the factory settings (having to re-key all user names and passwords); unplugged the DVD cable (which is the only cable he touched in his original process) and plugged back in. We have gone through every button on all the remotes, and every menu on Roku. I know that sometimes there are not obvious ways (shortcuts) to get to menus by pressing certain buttons a bunch of times, and wondered if he did something like that. Any help is appreciated. We spent too much money on these products for this.