Zac is spot on. Pull the playfield switch connector from the mpu. If scoring stops it's a playfield problem. Check the sling shots, over time the assembly gets loose and they fall unto the wires underneath causing a short.
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Zac is spot on. Pull the playfield switch connector from the mpu. If scoring stops it's a playfield problem. Check the sling shots, over time the assembly gets loose and they fall unto the wires underneath causing a short.
Try cold booting the game without J3 connected. If no points racking up then definitely a playfield problem. If it's racking up a lot of switch closures it would take a few seconds for the game to catch up. How many points are being added? That could narrow it down to the bad switch. I'm with ZAC on a bad cap.
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