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