i'm looking for instructions on how to reset or reinitialize our Poly 61, and to ask for help diagnosing the very strange things it's doing, such as:

1) at each octave, two adjacent keys play exactly the same note

2) holding down one of the keys causes a stuttering/grinding sound. almost as if they arppegiator were engaged

3) 5 or 6 keys near the bass end of the keyboard don't play at all

any ideas?