Both I and my daughter have ZX-M's (SLR manual focus). I also have a couple of flash units bought in the 1980's - a Toshiba 316 manual unit and a Vivitar 285. The triggering voltage on the Toshiba is 190 volts, have not measured it on the Vivitar yet. How much voltage is enough to damage the ZX-M electronics?

I had the meter on my ME Super repaired a few years ago - about $100 US. Then the shutter went out a couple years later. I did not throw good money after bad, but bought a ZXM body and a K-1000. The ZXM does everything the ME Super did and then some. Some folks have a problem with the fact that it is mostly plastic as opposed to metal on the ME Super.......

I had the same thing happen. Cost me about $100US to fix. You need to decide if that's worth it, or if you should buy another body. The shutter went out a couple of years after I had the meter fixed, so definitely NOT worth it in my case.