I am using a TV card. Usually when the TV is on there should be no interference whenever I open a document say word, excel or other. But there is always an interference. Further, my Tv comes as s small window display. Whenever I change to full screen view, the picture and sound become jerky and unclear. I did reset the display settings but nothing is forthcoming. Thanks hang-the-9 for looking into my problem. My TV card is of type HONESTECH-2.5. Thanks again.