I just purchased the roku express 4 days ago and everything has been working perfectly until today...while watching tubi the picture randomly keeps scrambling then freezes and the system restarts on it's own...any suggestions??
How are you powering the device? Is it plugged into the TV USB port or is plugged into a wall with the provided cable and adapter? Have you tried using another HDMI port on your TV or switching out the HDMI cable that you are using to connect the device? Do you see the same issue happening when you connect the device to another TV?
Please keep us posted and we will continue to assist you from there.