Squealing from CenterChannel

Hey. I have a k7n2d-ilsr with soundstorm. Im using a stereo cable to connect my comp to my reciever (jvc rx-552) and im getting a squealing sound from the center channel. Its not too severe, just a high pitched whine thats really irritating. I think its some kind of short but I checked everything and all is connected well. I think something might be wrong with the stereo connector on the mobo because if i move the jack it makes a noise like if you touched 2 input wires for a reciever. Headphones work fine, but i think that there are more subtle frequencies for the center channel and something is causing a short. Any help?

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