Turntable fixed ..... no!

I picked up my turntable from Audio Warehouse. Kevin had discovered that a micro-sensor had become dirty and stopped it from turning on and he had it working for the past few days. However, when I got it home and connected it back up, it didn't work. I called  him to see if he'd locked something that I'd overlooked but he was baffled. I took it back and everything appeared in order, it just doesn't turn (which is an important attribute for a turntable).