I recently signed up for At&t TV. We have 4 TV's in our house. 3 are VIZIO's. One was just purchased 2 weeks after we received our set top boxes. One other VIZIO is about 5 years old and one is 6-7 years old. The 4th TV is an old Westinghouse flat screen that is probably about 15 to 20 years old. The only tv that I have been able to pair with a set top box is the old Westinghouse. None of the VIZIO tv's are fully functional with the RC81V remotes that were sent to us. I was on the phone with an At&t support person for about an hour one evening trying to pair the remote to my newest VIZIO. We finally got everything to work except the volume control on the remote and he finally gave up. The other two will not turn the TV on or off when the set top box is turned on or off. So at the present time we have to use 2 remotes to use these 3 TV's. Is there a specific code or a range of code that can be used to pair the RC81V remotes to my VIZIO tv's? And if so how is that code inserted at the pairing process?