ALSO the picture keeps going black on and off. Then comes back with no audio. HELP
The HDMI connector(s) may not be completely plugged into their HDMI ports. you should feel a 'click' as they lock in place.
I am not a Comcast Employee. I am a Customer Expert volunteering my time to help other customers here in the Forums. We ask that you post publicly so people with similar questions may benefit from the conversation. Was your question answered? Mark the post as Best Answer!