No, I haven't tried using the original remote, so will definitely try that. That will determine for sure if it's a problem with the IR repeater or the box itself.

I haven't heard of a "magic eye" but will try and find out if there is one available in the us. It's also been suggested to me to (i) cover the eye on the box with painters tape under the emitter and (ii) cover the second frequency receiving eye on the receiver to reduce cross talk. Will try both those ideas also. Let's see if I can get this to work. Will be a real shame if I can't.