Korg Mono/Poly

Hi,

My name is Nick, from Australia and I have owned a Mono/Poly for about
one week! Up until yesterday, it worked 100% but I fear it's dying now...

Triangles now sound distored, unless the resonance is up full, then
they sound normal! And in poly mode, chords sound badly distorted
unless res is up full... 

I don't think there's anything I can do for it, but anyway, I look
forward to learning as much as I can from you guys.

Cheers,

Nick.