Here's what ya do. Turn off tuner 1 with the front panel power button. Then press either the up or down key on the front panel. This will get you into the system info screen. Once you're there you can see what address remote #1 is set to and change it accordingly. Once you've done that, you have regained control of the receiver via the remote, and you can update your various settings. This is a software issue, which should be fixed in the next release. I believe current is 4.21 which has the issue. 4.22 is out, but not yet available to all receiver revisions. Should be a couple more weeks.