Can you please specify the issue you are experiencing? What Roku model device are you using? How are you powering that Roku device? Have you tried connecting the Roku device to another TV to see if the issue persists? What are the steps to reproduce the issue you are seeing? What troubleshooting steps have you already taken to try to resolve the issue?
With more detailed information, we will be able to assist you further.
Thank you Danny for your response. I have disconnected and reconnected the HDMI and electrical cords. Problem solved. Rookie mistake. Appreciate your questions…made me start at the beginning of what I already knew.