I'm trying to connect an hdmi cable through the DVI-HDMI connector on my pc to my Vizio tv (that has a 720p resolution). I've been able to do this easily before, however recently after switching out a broken cable it will just not work. My pc recognizes the connection when I plug it in, my monitor blinks and its showing my tv in the display settings. But no matter what I do I just get "no signal" on the tv. The display setting set from my pc for my tv is 1280 x 720 (native). I've tried 3 different hdmi cables, the only thing I'm thinking is possible is that the DVI-HDMI connector is broken or I have something set wrong on the settings. Thanks in advance.