Well, I went to collect my camera today, having received a letter from the retailer that the camera was back in the store.
Handed over my ticket, salesman vanishes into the back and brings out the camera. Pull out one of my lenses, attach it, slot in a CF card and power it up. Everything looks good. With the salesman watching, hit the trigger.
Salesman fetches manager. Show manager that despite being ‘on’, the camera is defunct. He nods, and says he’ll call the service manager at the place that repaired it (’electronic adjustments’) and deliver it himself. So now I wait even more for my camera to come back to me in working form.