need help high pitch humming noise :/
I have a 4 channel amp kicker 10z350.4 that is hooked up directly to the speakers and from there I hook my computer directly up to amp. I hear a humming noise from the speakers even before it turns on.
I originally i hooked it up with the M4-ATX 250W power supply and I thought that it might be the power supply, so I hooked up my 850W corsair PSU and the humming noise comes out the the speakers right when i plug the power supply in (with the switch in on or off position) when the computer isn't even on yet.
I tried this with another one of these motherboards and didn't change anything.
When I have the amp hooked up to my phone the noise is not there what so ever and sounds really good.
I have tried hooking my laptop up to the amp and the humming noise is not there either.
I have tested the carpc with headphones and the humming noise is not there.
The amp cancels the noise out when I set the crossfire or w.e. to low the noise goes away and when I have it on high or off the humming noise is there
I have also tried it with a totally different set of y cables and that didn't change anything.
I haven't tested it with another sound card yet and I don't really know what it could be. The sound goes away when i unplug the power supply and it also goes away right when i unplug the audio cable from the computer.
I have the computer in a plastic container with the motherboard stands on it and also a static bag between the bottom of the container and the motherboard.
I have been at this for awhile and this is causing me to disconnect my carpc whenever i go somewhere bc it drives me up the wall.
Only things I can think of would be soundcard, motherboard, could the processor cause the problem (I don't think the processor is activated at all when the motherboard isn't on). As I said I have tested this with two of the same motherboards (GIGABYTE GA-880GMA-UD2H).
btw sound is onboard and testing was done with only power and audio cables hooked up.