Greetings, jmfink01! 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 you keep running into this error no matter that cable box you are using (unless you use the old one as you mentioned). I would like to look into this and see what's 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.
Hello, jmfink01. I have not heard back from you and hope the issue has been resolved. If you still need assistance, please feel free to start a new public thread.