My trusty OM-2N has recently started giving me problems. The camera itself works fine and winds fine, but fir some reason whenever I try to use the attached Winder 2, something goes wrong. Typically, the winder takes the shot and while it winds, it sounds like the winder slows down and then just stops. Then the winder won't work until I take a shot with the on-body shutter and wind it manually. Then the winder sounds like it's charging up, and will let me shoot again. I thought it was the winder, but I tested it on an OM-1 and it works fine. The body was last serviced by John Hermanson in 2008, so I don't think it would be a lack of grease or something like that. I am wondering what the problem is, and more importantly, whether it's easy to fix.