[sdiy] OT Non functioning buttons on U20

[steve jones]

Not analogue but my mother keyboard, a Roland U20, is playing up.
The little buttons for editing / selecting sounds are dying on me.
*Before* I do my usual "take it all apart and f**k it up some more", I
thought I'd ask if anyone had any dealings with this sort of button
and knew what was going wrong. Its been a steady decline of function
over some time but not really a problem until now.

Any insights would be most welcome.