Hi guys . Among my collection I have a multicart that has a problem when playing it . It worked well at first for years but I suddenly found out that it no longer works well . I don't know if it's related but I guess that happened after a friend of my brother licked the cartridge because he thought it would increase its connectivity and it worked for a while then it became like that
And some games give black screen and don't work
(https://i.ibb.co/KzC2QzJ/20230226-163826.jpg) (https://ibb.co/QjsPqj4)
(https://i.ibb.co/8xh2kYJ/20230226-163555.jpg) (https://ibb.co/WzTFCVQ)
(https://i.ibb.co/KzC2QzJ/20230226-163826.jpg) (https://ibb.co/QjsPqj4) (https://i.ibb.co/Swdzb4W/20230226-163717.jpg) (https://ibb.co/5hnPmgt) (https://i.ibb.co/y0nMH5X/20230120-160452.jpg) (https://ibb.co/0qjWHZc) (https://i.ibb.co/KNpydvW/20230120-160551.jpg) (https://ibb.co/Gs4PySR) (https://i.ibb.co/W6y0WhK/20230226-163222.jpg) (https://ibb.co/mGq0Cjz)
These traces look broken for me. Check with a multimeter.
(https://cdn.discordapp.com/attachments/443514410544136232/1080829156868239480/brk1.png)
(https://cdn.discordapp.com/attachments/443514410544136232/1080829493100417054/image.png)
If they ARE broken, you can try to recreate that link by scraping off some of the solder mask and adding a tiny copper wire to patch the gap.
The contacts themselves also look terrible. Should clean them with IPA.