Hi! I'm glad to talk to someone who likes Crumars.
Sorry but I'm not a technician. One day the Polyphonic section of my DS2 was suddently H.S, after repairing it, the technician said to me that the complete Poly supply had exploded. Maybe you've got the same problem. Why don't you see a electronic-man?
Sorry for my bad english, I'm french.
Bye !
Elysian