I have a Canon EF 50mm f/1.4 that refuses to autofocus. When I mount the lens, turn on the camera, and press the buttons to begin autofocusing, nothing happens. I don't even hear the AF motor trying to do anything. I read that Canon has issued a service notice for this lens related to focusing problems, but my serial number starts with
18..., putting it well outside the range of numbers covered by the notice.
I can focus the lens manually. The lens in question fails to focus on either of two bodies, and all my other lenses continue to autofocus on either body without any problem. The batteries in the bodies are fully charged. The contacts on both the camera bodies and the lens look clean, shiny, and undamaged.
Short of sending it in for repair, is there anything I can do to get the lens working again?