I've been gifted this Casio small keyboard (don't know the model - it's prolly a 7xx or 8xx). It works fine except if I press two keys at once. Then it sounds crackly.
I suspect it's a chip problem. Anyone experienced this / got any ideas how to fix? I'm sure it's off warranty.
I would bet money I'd need to find and re-solder a chip or soemthing.