I am very fond of the Logitech Harmony remotes, too. I think there is a thread somewhere on the ML CLub about that, if my RAM is not faulty. But what I want to share is something different, happened to me by accident. I was recording my daughter with my video cam and she happened to use a remote, pointing it at me. When we watched the film, we actually saw 2 flashing lights on the remote's emitter portion, something that you don't see normally if you look at your remote while pressing buttons ! Therefore I can recommend this simple test, if you have a video cam: record 5 seconds of somebody pointing it at you, and watch the film. If you see the lights, the remote is "working", i.e. emitting. If not...