Volume up button still not working after repairs

I've replaced the power button board two different times and every time, the power and volume down buttons would work but the volume up button still isn't working. I think it's some kind of software malfunction or something like that but I also tried factory resetting my switch and that didn't work. This person (Power button not working after replacing power button board) asked a similar question 3 years ago and never got an answer so I think this problem is a lost cause.