I replaced the PC board on a few with bad electronics with mixed results. I think the replacement PC boards I obtained suffered the same deterioration as the failed cameras.
I got seven NOS electronic boards in the mail today. I have not seen any electrolytics in the assembly. There are a number of important on/off switches and all have been identified as functional. My impression is the camera would behave as it does if the wiper for the aperture were faulty...