The red marks are both on the face of the circular drive part of the winder( on the E model. )This is the bit that connects with the camera where the winding crank normally fits. My book was published in the late eighties, which must have been before the motor drive S became available. It may have had a different design, but the troubleshooting chart for the E model describes the same problem you had. Given my own experience, fresh alkaline cells may cure it. Alex