How do I remove the audible buzz I get when I connect my tx2500 to my TV with VGA-out? I've got a heavily shielded VGA cable and a 3.5mm to RCA stereo cable. It's noticeable through talking passages when I turn the volume up on the computer and raise the volume on the TV to compensate, but it's pretty much inaudible with music playing. If I change the volume the other way, then the buzz is less noticeable during talking. But I'd rather eliminate it entirely. Any suggestions?