I don't know if this is the right place to post my question but anyways, I have this problem with my motherboard (I think) its an ASRock 990FX Extreme4 mobo. So here is the problem. Sometimes when I turn off my computer, my speakers make a screeching noise. I think its the audio jack. Has anyone else reported this problem before? Because I checked numerous forums for the problem and I could not find anything related to this. What should I do?