andrew074, before anything else, I'd definitely clean the cartridge slot. Of course make sure that there is no corrosion or debris or bend pins. Also clean your game cartridges. Here is a bit of a guide...Hope this helps, good luck.
We have a chance to guarantee our right to repair electronic
equipment—like smartphones, computers, and even farm equipment. This is a once-in-a-generation
chance to protect local repair jobs—the corner mom-and-pop repair shops that
keep getting squeezed out by manufacturers.
Join the cause and tell your state representative to support Right to Repair. Tell them you believe repair should be fair, affordable, and accessible. Stand up for your right to repair!