I have a sony 60" sxrd tv, when I connect from svideo on my laptop to the tv it displays a picture (BUT), when the Laptop is plugged into the wall There are scrolling white bars going up and down on the tv picture, when it is not plugged into the wall, it is perfect? How can I remedy this without running the laptop unplugged everytime i want to connect svideo? I have read something about it is due to the fact that the tv and laptop do not share the same ground or some crap like that??