Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
I am having the same issue. Have tried 3 HDMI cables and all 3 HDMI ports on the TV. Have reset the device. It works fine for 10-20 minutes (always varies), then it will go to blue screen "no signal" every few minutes. The audio also cuts out briefly. Very frustrated that there is no way to call ROKU for support.