Anyone know of good custom firmware that can be flashed onto a 50" Roku tv? I had one given to me last year and I sure as hell am not giving that thing net access, especially now.

I've never really used it yet except to plug it in once to make sure it works, but I was thinking of setting it up as a secondary "game room" tv so it doesn't really need internet anyway, but I'd like to leave no trace of anything roku on it if at all possible.