You're welcome, Chony. I'm glad to offer advice that might prevent someone or their equipment from meeting an early demise. It's good that you were able to resolve the problem you were having without removing the powerline ground connection.

--Barry
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Yamaha: Motif XF6 and XS6, A3000V2, A4000, YS200 | Korg: T3EX, 05R/W | Fender Chroma Polaris | Roland U-220 | Etc.