The part number is WB827100. I do not know how much it costs. It's the AM Circuit Board, it's buried under a couple other boards, and this is a job that should be done by a professional repair person. It's not something most folks could tackle themselves.

Good Luck,

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)