I HAVE A SONY PFM-42V1 PLASMA TV AND JUST SWITCHED OVER TO COMCAST. THEY HOOKED UP A SCIENTIFIC ATLANTIC EXPLORER 8300 HDC BOX WITH HDMI OUTPUT. I WENT OUT AND BOUGHT A CABLE (HDMI TO DVI)FOR THE CONNECTION. APPARENTLY MY TV CANNOT READ THE HDMI SIGNAL. I GET A BIG RED CIRCLE WITH A LINE ACROSS THE HDMI LETTERS. IS THERE SOME KIND OF CONVERTER BOX I NEED. IF SO WHERE CAN I GET ONE. THANKS FOR ANY HELP. PETE.