I installed a Compusa 4 channel sound card PCI 32bit in my E-machines T2042 when my onboard sound suddenly stopped working. the sound coming out of the speakers is so scratchy that I haven't been able to use them at all. I have tried using other speakers but nothing helps. I've uninstalled/reinstalled the drivers, tried installing the card in different PCI slots, but nothing helps. Does anyone have any suggestions to help me?