Hooray! I've had a letter from Olympus. Their technicians have examined my camera and found the fault to be caused by a knock or a drop! I did explain that in a covering letter but it's good to know me and the technicians think along the same lines. They are going to overhaul it and give it a full health check with a six month warranty on all parts. I'm sending my cheque off today and hopefully will get the camera back shortly, completely recovered from its ordeal. I've really missed it, even though it's only a camera!