Originally Posted By: Dusan
I had a humming noice on my PA to,if I conect external monitor also had humming noice when I conect rear USB port to PC.

Eny explanation about that?


Yes, itīs a problem of different electrical potentials.

Try to turn around the 230 Volts plug by 180 degrees and plug it in again. First the one auf the Audya, than, if that doesnīt work, ALL the 230 V plugs of the PC / monitor and all other with the PC connected 230V devices.

I assume that all devices are connected to earth !!! This is a must !
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