As I'm nearing completion of my WCS restoration project, I'm trying to watch for any final issues to pop up. Well, I believe I have found one. On seemingly rare, sporadic occasions, I have noticed that both flippers stop working as well as the DMD goes blank. Everything still functions and after a few seconds, the DMD and flippers come back to life as if nothing happened. It seems that every time it's happened, it was in the middle of multiball. At first, I thought it was something normal going on with the game (I'm still learning the in's and out's of this game) but it seems pretty clear now that it's not normal. I think I've seen it happen 4 or 5 times over the past 2-3 weeks or so while it's been back to a playable state.
So, my guess is that something is failing and is surfacing especially when seeing a little heavier stress during multiball (thinking of all the high frequency of flipper hits, solenoid activations, etc...). The DMD is a color LCD unit that was installed by someone prior to me restoring this game. I believe that all of the capacitors and bridge rectifiers on the power driver board are original. Without any real diagnostics (yet), my gut feeling is that it's probably a cap causing the issue. If not that, could a BR even cause a behavior like this? I had a BR fail on my Getaway earlier this year and the game wouldn't boot (i.e. it wasn't an intermittent failure; it flat out died). If not a cap or BR, I guess it's possible that a connection is loose, but the way it behaves is if it just gets tired, stops working, then if I leave it alone it returns to normal after a few seconds.
Thoughts?
Seems like those 15000uF caps are out of stock at Great Plains, Digikey, Mouser... looks like Marco has them though (double the price, unfortunately). I'm planning on at least replacing the caps first but wanted to get thoughts from others of what else could cause this behavior.
And here's a random restoration pic for fun.
LeeBohonIMG_1253 (resized).jpg