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2013 Ultraslim Dock with USB Powered Speakers makes noise

HP Recommended
Elitebook 840 G1 and 2013 Ultraslim Dock
Microsoft Windows 7 (64-bit)

I have some 840 G1 in 2013 Ultraslim docks running FW 2.30.  I have recently been adding some inexpensive USB powered speakers.  I am noticing that the speaker runs great connected to the 840 G1 directly while in the dock (USB and speaker), but if I connect the USB power connection to the dock I get noise (hum with noise over it). 


Has anyone else noticed this? 



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