@lbaldwin-
The fact that other inputs are okay doesn't necessarily mean it's not a tv setting problem. On many TVs, each input has its own independent picture size setting. It may be called picture size, aspect ratio, or something similar.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X
