Chosen Solution
I received a North American version of the Nintendo brand SNES controller where the right bumper does not respond. I opened it up and cleaned out all the contacts and I also can’t find any sort of wire break or pin problem. I read that this may have to do with how the controller interacts with the CPU with pulse clock cycles, but other controllers I’ve tried don’t have this issue. Is there any way to fix this problem, or am I stuck without a shoulder button to lean on?
That’s usually caused by the flat cable that goes from the controller board to the motherboard. All you have to do is either replace it or remove it and solder wires for each trace instead. Some good old cleaning with some IPA will sometimes be enough tho. Juha Toikka you probably broke another flat cable trace.
