I recently picked up a slugfest that was running/working, except the bat wouldn't swing when you pressed the button. The price was right, so I scooped it up and brought it home, figuring I was going to find alkaline damage; Slugfest did not disappoint.
I found that there was light damage, and the batteries were actually oozing. I cut off the battery holder, neutralized the base, scrubbed the affected area and flushed with rubbing alcohol.
White there was a few darkened traces, I found only one trace that was actually eaten up. I replaced all the corroded parts and jumpered the broken trace.
When I finally hooked everything back up, I'm greeted by garbage on the dmd, the bat moves when I press the button and a single bong sound.. not much else. The mpu's activity light is blinking like it should. If I cut power for the cab a half second, and turn it back on, I get the bong, and attract lights. The bat no longer works at this point. The dmd still has garbage and none of the coin door buttons work, doesn't coin up, etc.
I haven't really worked on these newer mpu's too much, and wasn't quite sure where to start. Any tips?