@david052874-
Do you have a model with a SD card slot? If you have an SC card inserted, try removing it. An SD card that has gotten corrupted can prevent a Roku from advancing beyond the bouncing R-O-K-O letters startup screen.
For a Factory Reset, the reset button has to be depressed for at least 30 seconds.
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.".
Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X