Picked up my wife's childhood pin this weekend after it sat in a trailer, in a field, for two decades. I got rid of the mouse nest and replaced the three fuse holders that are always junk on these and that got it to wake up, kind of. I've since cleaned off ALL the, uh....debris.... and waxed, with new rubber.
When the game is turned on I see all zeroes on player 1, "4" followed by all zeroes on player 2, then both go blank and the credit display goes nuts. Looks like 08/88/etc, just over and over. Tilt bulb lit. Clearly something isn't happy. Both tilt switches look fine and aren't engaged. LED1 on (dim) but quickly off when powered on. LED3 & LED4 both on, then off, then back on when powered on.
I pulled the board to check for cold solder joints (didn't see anything) and to polish the edge connectors. With the board removed I turned the machine on and observed the behavior in picture 4. The displays never went blank. Board back in, same behavior as before. Looks like I'm getting a solid 5V at the capacitor on the board and I don't think there are any issues with power delivery, but I'm not sure what I can check next. Any ideas?
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