I got into it but I was only able to fix the play button. But if anyone wants to give it a go: Take the rubber pads off to reveal the other 3 screws. It will almost open but not quite and you’ll notice something is still holding it together near the middle. There are 4 hidden plastic clips, 2 on each side near the middle. I took the backside of a thin knife, and while gently pulling the case open a tad, I ran it in between the 2 halves of the case and it released the clips. Of course I did this on the other side and broke one of the plastic clips. After that it’s just one screw that holds everything together. May or may not fix it. Didn’t work on the stop button. I tested the contacts with an ohm meter and everything looks right so I’m not really sure what it could be at this point. Maybe that one rubber pad. Just using play and stop on my QC for the time being.