OK, so I got a T5 Hori for dirt cheap, ordered some Sanwa buttons and a joystick, and tried putting everything in. Everything works fine, except for one button.
The problem is this. In order to get the huge Sanwa prongs into the tiny holes on that PCB, I lightly drilled out the holes to make them bigger. The first button I did this on, I went a bit too far and mistakenly drilled out a large portion of the metal contacts, which the prongs are soldered to, on the other side of the PCB. There was still enough left to solder to without problems, or so I thought. Now the button works on and off. Sometimes it works without problems, other times it will work every other time, and still others there will be no response at all.
What’s the best course of action to fix this problem?