When trying to use the Roku stick, double check that you have set your TV to display the HDMI port to which you have connected your Roku.
To perform a Factory Reset via the reset button on the Roku stick, you must press and hold the reset button for a minimum of 30 seconds, no matter what you may or may not see on the TV screen.
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. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X