Swapped out a HR20-700 that was hooked up via component. It was working fine with the TV. Installer put the HR34 and hooked it up and you get the start screen, then it goes blank. He swapped out the box and with another one and same thing. We then tried HDMI on both and it worked on both. Why would the component input that worked 2 minutes ago, not work on the HR34? Any known issues with using component on the HR34?