I am having this problem. I have 2 dual-tuner receivers. One day my remote addresses magically changed to the same one, and I have no idea how. Now my 2nd and 4th TVs are both being controlled by the UHF remotes. I want to change the address of one of them, but I followed the above instructions, and although the remote itself changes, the Sys Info screen does not reflect any change. So the remote stops talking to the TV.
Any idea how to fix this? I am lost!
Thanks!!!