Help with no tv picture

Unplug the box for a minute or two. Verify your connections are tight. Also, you can check for outages in the Xfinity app.

There is no specific reason for that code. 

If the box is functional at all, press the A button, and select System Refresh. 

Thank you for reaching out to us @user_g11kyz! Have you had a chance to try the troubleshooting steps Tek shared?