Quoted from smoothbore19:
So after having my Demo man for a few years I did a full topside tear down of the play field. I got it all back together, and am now having an intermittent mid multi-ball reset. This never happened before. I have checked the underside of the play field for any loose wire connectors, but did not see any. I also checked the boards for loose connectors, abut again they seem fine. Any ideas?
I'll help as I seem to be getting plenty here.
My DM reset during multiball after I put the thing back together as well. Ended up being the 5v dropping out. With all the coils firing and switches etc I think it was draining the power and shutting off.
You may need to rebuild the board, I borrowed a daughter board first to see if that fixed the issue and it did. So definitely look at you voltages!