Just helped my uncle hook up his new Samsung TV. I connected his cable box to his TV and then hooked up his New HDMI cable from his cable box to his TV. The tv part works just fine, but when I go to SOURCE and to HDMI to view his HD channels it says NO SIGNAL. I dont' get it. The TV works and he gets his basic cable but then go to HDMI to view the HD channels and Nothing but "No Signal" Am I doing something wrong here? Anyone know what could be causing the "NO SIGNAL" when I go to HDMI? thanks for the help