Hang on, hang on. This is at low volumes, correct? If you have the signal turned up when you turn on the receiver, does it still happen?
When you say a mechanical noise, if you stick your ear up next to it, does it sound like the signal's actually coming through, but it's several octaves too high and waaaaay too quiet?
How long does it take to go away?
I'm asking all this because I'll be shipping my EP350 back to Axiom shortly because of a problem like this (I don't think mine ever flips on if it's doing it, though), and I'd rather not waste their postage if it's normal!
