Quoted from KSP1138:
Are these the correct reinforced targets? https://www.marcospecialties.com/pinball-parts/A-18530-5R
I started getting freezes over the weekend and eventually determined a couple targets are most likely the source of the issue. They don't show up as stuck switches in the test, but I think the contacts are close enough together that they probably mess up the PROC while in game after one or both take hard hits. I'd tried some manual adjustments to the targets to get the contacts a little farther apart, but haven't had any luck yet. Those targets have taken a beating.
For troubleshooting, I checked the USB connection from the PC board to the PROC and all of the connections under the playfield. I was able to play 3 long games with the targets disconnected so I'm pretty sure I've narrowed it down to them.
I took out the 5 oblong targets, got them bent them back into shape, put them back in, and made sure none of them were sticking. I still had frequent lockups after that. Through a lot of troubleshooting I believe I have narrowed it down to a single target (Light to the right of the Dude ramp - SW17), that when connected and after a hard direct hit, will lock up the game.
The question I have is why would a single target that isn't sticking cause this lockup issue? Maybe a bad diode?
The other question I have for Rensh is about the PROC and that bad powerpin solder issue. My serial number (486) is very close to the range of serials (490-540) that might have that issue. I don't think this is causing my issue since it only seems to be with the one target, but I thought I'd check if you have seen anything like this before. I did the basic PROC troubleshooting, moving the connector over to USB3, reseating the connectors, reseating the memory on the motherboard, and checking the log file (no PROC lost messages there). The only thing I haven't done yet is replace the USB cable.