I have a Hitachi P60X901 Plasma TV. I have Verizon Fios service provider. I have called Verizon and they confirmed all signals are working. I took the set top box connected to the Hitachi and tried running HDMI to another TV in the house and it works. But when I use that same box and run HDMI to the Hitachi, the Hitachi is not receiving the signal. Do I need to update some software? How do I do that? Do I need to adjust a setting in the TV menu that I've missed? Please help! Running the TV on a coax cable now and the picture is awful.