I have escalated your issue to the Comcast Team available to these forums. Check back often for a reply in this thread from a Comcast Official Employee.
Greetings, @Adam44! I appreciate you taking the time to reach out to us here on the forums. I hope you are having an amazing day! I apologize to hear of the issues you are having with your reception on all your cable boxes. This is certainly not the experience we want for you. We would certainly like to have a deeper dive into what could be going on. Can you please send me a PM with your first and last name so I may further assist you?
To send a private message, please click my name "ComcastMichael" then select "Send a Message" on the right side.