ghost press on the rythm button

So i bought this used P-125a and occasionally the rythm would activate itself. But today it got so bad that everytime I turn on the keyboard the rythm would activate, it's still running as I write this, I tried holding down the metronome button without the rythm and it activated function since holding rythm+metronome does that, so it leads me to think that rythm is being continuously pressed down, in one instance function was activated without pressing down anything leading me to suspect that metronome button could also have the same problem. The piano was mostly clean on purchase save for this volume slider which has collected dust.