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I have a ground loop issue producing a humming noise when connecting my laptop to the aux audio input of a beosound 9000 mkIII.
I have read all the guidelines and documentation I could find on the internet but couldn't solve it yet.
I have the beosound 9000, 2xbeolab 1and the PC connected to the same power strip.
The humming noise disappears if I disconnect the laptop from the mains and runs on battery.
I have tried a desktop PC with exactly the same result as with the laptop.
On the other hand if I replace the Beosound 9000 by a Beocenter 3200 the humming noise disappears completely.
Any suggestions?
Do you think it could be something wrong with the Beosound 9000?
I don't think that there's something wrong with your 9000.An easy solution for fixing ground loop issues is a DI box:http://www.thomann.de/gb/millenium_dip_passive_di_box.htm
I finally solved this issue. The aux input cable was defective, just replacing it by a new one solved the problem.