Esq 1 buttons not working

Hello this seems to me like it could be an easy fix but I’m not sure what to do as of now. My “compare” button and one of the soft buttons on my Ensoniq ESQ 1 won’t work but weirdly they do work if I open the board and jiggle it a little (and while it’s open I could repeatedly press the buttons and they will respond) but once I fully close the board they stop working. I tried air dusting the circuit board below the buttons but it hasn’t worked and I don’t want to pay a lot for a technician to fix just a couple buttons if I can do it myself. Any help would be greatly appreciated!

Thank you!