Got a screwdriver and a soldering kit to hopefully fix my 3DS. For years the R button stopped working and it stopped charging. hopefully I can get this to work tomorrow!
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Good luck!
Update: R button still works and I managed to break the analog stick while opening it up. Aparently there is a small clamp that keeps the cable in place and I broke it off and lost it :( At least I can get it to charge and I can see the old photos I've taken on it