Something to try would be to lift the mirror, and pull the curtains to the wind side and let them snap closed.
If they snap across the film aperture they are tripped/released.
Does the sprocket move at all? It should be free if you press the rewind button and move it with a finger. When advanced, it should only move when the film's advanced.
There's a gear system under the top cover that advances film and cocks the shutter. It's under a plate or two but sits at the rear of the camera, wind side.
FWIW,
There's a hidden screw under the little lens index on the front. A drop of alcohol on it and a straight pin work well to pop it off.
When you are set to remove the top, Set the speed to B and film speed to the highest ASA. Minolta used a string to couple the meter. Mark the pulley & frame so it goes back the way it started.