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Spider IV 39 issue: Continuous big buzz only.

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My spider IV 30 can't work anymore.


When I switch on the Amp there is a big noise like a big bass buzz.

All volume potentiometers are useless.

I also disconnected the speaker and I got the same issue on my headphones.


Any ideas?


It can be the power circuits or the Head circuits.



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Have you tried a factory reset?  Hold the 'A' button in as you turn on the amp.

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