Had my Harmony remote for a few yrs now, never had an issue with it. Just got my new HT done and now , I cant get the Harmony programmed just right for the SR-6006. Main issue is when I try to program it , it doesn't have the " GAME " input listed as one of my choice. Put when I try to do it manually is where Im occurring the problem.. It doesn't go to that input automatically .
On the remote go to the "devices" page and select the Marantz. Try all the input buttons individually until you find the one that works (they are often labeled incorrectly). Once you find the correct button you can assign that as the input button. If the button is not in the database, you can teach it from the original remote and then assign it.