I'm trying to sell my haunted house and I'm going through it just trying to take care of some minor issues. Right now, the one I'm having trouble with is 2 of the displays have segments locked on. They will always show a 1 regardless of what number should be displayed. It's only on the credit/match display and the basement display so i can't even switch them around. My first assumption was just that the card edge contacts were dirty, but after cleaning and even retinning the problem remained.

Next step I'm wondering if i need to repin the connector or what I'm leaning more toward is a bad chip somewhere (7404? 7432?)

Any help to point me in the right direction? In the pics you can see credits should read 0, and the lower display should be all 0's not 0's with lines through them
20201004_224359 (resized).jpg20201004_224428 (resized).jpg

Thanks for the info, but I not only tried that, but I also tried cleaning them with a fiberglass brush as well as re-tinning them, all 3 things and no luck

The displays work fine other than the segments in my pictures always being on. You can decode the scores and credits fairly easily and its never really bothered me that much, but I figure if I'm going to find a new owner, I should probably take care of that issue. Good tip on swapping the basement display, I couldn't remember if it matched the normal displays or not.

Excellent info! This should help me get on the right track. Thank you!! I will update if I get things figured out

lol I feel so dumb, I just reseated the connector and it's working perfectly now. Still I'm glad i learned a little more about the operation of the system 80