Hey guys! I have an odd issue with my Gottlieb Bad Girls. I have only had it a couple weeks and honestly I didn’t notice if it did this or not when I got it so I don’t know at what point the issue started…
ANYWAYS…when I flip the right flipper, the lower display ONLY has random letters and numbers pop up dimly in addition to the actual score on it. It only happens for a split second right when it’s flipped….to make things more complicated, I’ve narrowed it down to the upper right flipper only. When I gently press the button and flip only the lower right flipper, it doesn’t do it.
Some things to note…everything is 100% otherwise, and 5VDC is where it should be, all the ground mods have been completed correctly by the previous owner and verified by me to be “grounded“ all the way through. The lower display, when I first got it home was about 1/3 dimmer then the upper….and during a few games (when I first noticed the random numbers issue) it would get dimmer and dimmer (lower display only) during game play to the point it almost went all the way out. As soon as I would turn the game off and back on it would be full brightness again. Also, the yellow caps on the flippers are all cut/broken (the wires) at the cap itself. I have verified nothing is shorted at the flippers, and it’s not a vibration thing (I tried banging on the head and PF while a game was in play, and it did nothing). Obviously, there’s something grounded or shorting somewhere, but I’m not sure how it would make its way back to the display, specifically from the upper right flipper to the lower display only.
Just for "GP" I’m gonna replace the electrolytics and the big resistor on the display board tonite, not expecting much but it’ll make me feel good!
Any help or suggestions are greatly appreciated. The pic is just a pic, I couldn’t snap a pic quick enough to show the issue, I may add a vid tonight. Thanks!