Do you have another tv you can connect this to? If so, see if it will boot up and give you a Roku homepage display.
If it does go to Settings > Display type and set it to the resolution of the first tv instead of the "auto" setting. When you get to the countdown screen click on the "yes" option. Now return it to the first tv and see if it works.
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
