Last night my RD-KB started doing this thing on a select few keys in the upper register where when I push it, it would play the note but not let go. If I unplugged it it would stop (I think this indicates that it's not my RADIAS-R
) but then when I plugged it back in, and hit the key again, it would do the same thing. A couple of the keys, as I was doing this over and over hoping for a better result, would intermittently work normally, then go back to being all broken. 
I'm not sure what to do...has anyone ever had this problem by chance? Or opened one of these up and know what might be wrong?
I never play hard with it, and last night all I was doing was recording some pad sounds, holding down the keys for a while. Only one of the keys that was freaking out was one I was playing (which is how I noticed it was happening).
Sorry to use so many words. Any advice?
