You can measure resistance between capacitor C15, C16, C17 and so on. You should read a low impedance but not a complete short.
You can un-solder the shorted caps and measure again the pads.
Also verify that the loading spring didn't scratch the surface coating on the PCB causing shorts.
I didn't manage to revive my boards yet. Have to put more time on those.
Thanks, I'll check that out. What would you recommend to do if it is the springs? Thinking I could coat the rim of the holes with clear fingernail polish.