What would be most likely cause of random intermittent ball launches during attract mode?
The game does it during play as well, but seems to be unrelated to drop targets or multiball.
When it happens during single ball play, you end up with Two balls on the playfield but without being in "multiball". If you drain one of the balls away the game continues as it should, until it randomly decides to shoot another ball to playfield.
Sometimes this causes a "trough jam" error, but mostly happens without returnibg error, it seems.
Checked trough switches, all operated 100% consistent in switch tests.
Been chasing it a while. Checked trough opto connectors, seemed fine. My next step might be to pull the opto boards? ... just posting to see if I've missed something obvious. Any insight?
Don't recall reading about this exact issue in here before. What would be first suspect to cause this kind of behaviour?