Ruled out tv. Another component device worked fine.
OK, unless I'm totally confused, you are saying that your existing TV works fine on component from another component output device, but not on the H3 component output. If you also tried different cables, then that pretty much proves the H3 is not outputting component video. I had a component cable issue myself. But that turned out to be my cables falling out of my wall jacks. I also speculate that just the green cable could be discontiguous or not in the right jack and cause the same thing (no video). That is because the sync signal is on the green.