I don't think you've got a defective part. Did you plug the ribbon cable into the connector that's at the back on the right side (when looking from the front)? Also, don't forget about the power connector. I think this has happened to me b4, but that was when I was using the AUX input on the card for my AIW Pro. Don't think its a driver issue either, BTW. I would check the settings, etc.