On many TVs, the picture settings are saved for each input separately. Try adjusting the picture using your TV's controls when watching the the input to which your Roku is connected.
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
