Up until a year or two ago, cable-companies were required to supply local "over the air" channels (including HD channels) based on their franchise contracts for each area.
It usually carried a special lower rate, so all people could afford some television coverage, if not in range for using an antenna.
The FCC regulations have expired, along with polititians (local and state) removing regulations to force these low rates.
So now with no regulations to hold prices low, you now need different cable-box for HR service, plus the extra monthly charges for the service. Your older box may have allowed you to still view local HD channels. It's one of the reasons they are always asking people to get the newer cable-boxes.
Hello StandardUser. Thank you for your feedback regarding your recent service issues. We apologize for any inconvenience and frustration caused. I am glad to hear the visiting technician was able to replace your box and get it working.
I'll be sure to pass along your sentiments regarding the RNG100 availability.