If it’s a capacitor and it had one “leg” on ground, it is not entirely necessary to replace it for functionality. In fact depending on what line and where the cap is I often don’t replace. Especially if it’s something I think might do more damage with me trying to get a new cap back on there. It’s probably there for electrical signal smoothing and there are probably other caps on that line that will get the job done.
Did removing that cap clear the short? Did you test to make sure Touch ID is functional now? If it is, then I might call it a day. If it is not, I can still see why you would want to replace this. It’s possible it’s a line with very few other components so the one capacitor is necessary. In which case, I will set myself a reminder to check this after work today. I know I have spare iPhone 6S buttons at home.
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
3