"He who marches out of step hears another drum." ~ Ken Kesey
We've had ours (Amergraph 150) almost 11 years and are seeing electrical gremlins the past year or so. Have replaced the contact relay Farmer mentioned and our electrician says he's gone as far as he can. So yeah, for the first ten years it did great but now every once in a while when we're burning screens we hear a real rapid clicking sound like relays closing and opening or something. But it keeps on working..............