I have purchased a non-working E-M10 and I think it has the same problem. I disassembled it and noticed that the shutter release motor is very weak and unable to configure the shutter back to its home position. I can see it try but it just doesn't have the torque. I can stop it completely with a toothpick, which I figure is not normal. My plan is to either buy a shutter assembly or shutter drive motor, both of which seem to be available on Aliexpress.