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Surface Dock Makes High Pitch Sound....

paulektaylor

New Member
When I have multiple USB ports being used... I haven't attempted a 2nd or third display, but just from an external HD (seagate 4TB slim portable) and a couple of other usb devices it makes this awful high pitch sound. It's almost not noticeable until you are right next to it, but now, when I'm at my desk, I can't not hear it... What's worse is the Dock Updater app doesn't see my dock, but my SB registers everything...
 

Votality

Member
Sounds like the power supply in the dock. Often switch mode power supplies can make a slightly audible sound if the switching frequency produces an audible harmonic. Can be due to many reasons one of which can be the capacitors they use. (Some smd ones have a piezo electric effect so they act like a mini speaker)
 
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