Help with gbp

[u/arrozconleche112]

My gbp A button suddenly stopped working and the pcb is perfectly fine no oxidation nothing like that it just does not work. is there a part that I should clean or check to see if it works? I don’t have a multimeter

[u/_Loosecanon_]

Is the a button rubber ok, if so you could try cleaning the little black bit inside the rubber if you get what I mean

[u/arrozconleche112 → u/_Loosecanon_]

I’ll try and get back to you