I have AM957G motherboard from PC Chips which has an onboard audio card running AC'97 Audio Codecs. I have it set for 5.1 surrond and untill tonight it ran smooth. It now has no sound out of the front left channel and acts as if it lost amp power to that side. The rest of the speakers function fine. I replaced both the LF speaker and then the whole set with a set that is known to be good. I tried to remove the driver and reinstall with no sucess, channel still gone. Lost and confused. Any ideas???