I just ran a 35-foot HDMI cable from my desktop's video card to my new TV, extended the computer desktop to the TV (as a second monitor), and fired up Windows 7 Media Center. Then I noticed two things ...
Before we talk about the advanced level of troubleshooting, let’s get a few things straight. First, Make sure your HDMI cable is not at fault. You can try it with another computer or another TV.