I recently had my MP serviced by DAG for an intermittent frame counter issue and I'm afraid to report that it can't be fixed but the frame counter unit will have to be replaced. Leica, in their infinite wisdom, had taken a mechanically perfect frame counter from the M3, M4 and M5 and simplified it, making it more prone to malfunction. I would try to have it done by Leica if still under Passport warranty to save the money. I was fortunate in that the Don could swap out my frame counter unit with the older more complex all metal M4 unit because the MP retains the exact same dimmensions as the M3, M4 and M6. Unfortunately, the M6 TTL and M7 are a slightly diffenent size and will only take the current style frame counter. Possibly playing around with the pin at the base of the camera might help as was suggested, but it's bound to act up again. Good luck in resolving this issue.