Speakers buzzing when PC powered off.

[Chong Warrior]

Wondering if someone has any idea why this is happening, it's really annoying and means I have to power the PC off at the plug otherwise it's impossible to sleep! I will say the speakers perform without fault when PC is turned on, it's only when I shut it down that the speakers make a really annoying buzzing sound. Even with volume turned to minimum it can still be heard but not as loud.

Speakers: VideoLogic ZXR-500 5.1 surround
Motherboard: Abit NF7-S v2.0 with onboard Soundstorm

Thanks for any help.

 

[Chong Warrior]

Probably due to a grounding loop. Can be caused by other things plugged into the computer, like printer, monitor etc. Apparenlty plugging everything into a trailing extension should stop it.

I've got everything plugged into a surge protector, would adding an extention and plugging the speakers into that on their own help?

Going to try leaving just the speakers and PC plugged in on their own later see if that stops it.

 

[Chong Warrior]

Doubt it. Do you get the buzz if you disconnect the speakers from the pc?

I'll check next time I power PC down. At a guess I'd say no, I have a feeling it's being caused by my motherboard.