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Buzzing noise from speakers when connected to monitor, but not PC

Last response: in Home Audio
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March 5, 2013 4:22:24 AM

So I have an Asus HD monitor that I'm using for both my PC and now my PS3 (I have to switch out the hdmi cables when I want to use the other device). The Monitor doesn't have any speakers so when I need audio for my PS3 I have to plug in the speakers into the monitor via a 3.5mm jack. The speakers are just plugged into my sound card when I need it for my PC.

The weird thing is that when I have the speakers plugged into the monitor I keep hearing a buzzing noise from the speakers. This never happens when it's just plugged into the PC though. I don't have another set of speakers, but I've plugged in multiple pairs of headphones into the monitor and didn't heard the buzzing noise which confuses me.

If anybody has any idea of what might be the problem I would be grateful.

EDIT: I just plugged the speakers into the monitor while the PC was connected to the monitor. No sign of the buzzing noise. So I guess it's not the monitor and something to do with the PS3 or the hdmi cable I'm using for the PS3.

Best solution

March 5, 2013 10:20:15 PM

It's a ground loop.
Plug in the monitor power with this:
http://www.adorama.com/ZZAC32.html?gclid=CNvj0bvo5rUCFY...
Use the adapter to lift the third pin from the monitor power plug.
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March 6, 2013 6:37:24 AM

soundguruman said:
It's a ground loop.
Plug in the monitor power with this:
http://www.adorama.com/ZZAC32.html?gclid=CNvj0bvo5rUCFY...
Use the adapter to lift the third pin from the monitor power plug.


Well my monitor actually uses a 2 prong plug. I tried what you suggested though and the buzzing noise still persist.
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March 6, 2013 7:18:33 AM

Best answer selected by Harwin21.
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March 6, 2013 7:19:45 AM

soundguruman said:
It's a ground loop.
Plug in the monitor power with this:
http://www.adorama.com/ZZAC32.html?gclid=CNvj0bvo5rUCFY...
Use the adapter to lift the third pin from the monitor power plug.


I just looked up what a ground loop is and now I understand what the problem was. I just needed to rearrange where things were plugged and now the problem is gone. Thanks for the help.
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