I had more or less the same problem but was stupid enough to provoke it myself by playing on the O-L-T switch, interrupting the winding-cycle. This can not be cured by the usual methods for "soft" or "hard" lockups as with the manual cameras where you can also play on the winding crank while working inside the body. As Michael said, leave it as it is and have a trained technician look at it. I did not follow this advise and paid for a complete overhaul plus some main wheels and springs in the end (ouch!).
Originally Posted by Allan Swindles