The 1st stage of my setup was just using DVD inputs on component and the component video out.
I worked with BOTH 480p(xbox games) and 480i(movies).

The 2nd stage of my setup was adding the OTA tuner with DVI2 input and DVI video out. The OTA tuner worked and continues to work. But after this stage only the 480p signal through the component works.

Troubleshooting so far. I disconnected the DVI input going into the TV (Samsung 30" CRT HD ready) to see if the TV's DVI input limited the component input on the TV - but same problem.

Also, the TV has 2 component inputs. I switched the component input on the TV to both 1 and 2 to see if that was the problem, but it wasn't. On both inputs into the TV 480p worked and 480i didn't.

When I get home tonight I am going to disconnect all DVIs from the 1070 and TV and see if the DVD 480i is functional. But if it is doesn't that mean that the DVI on the 1070 is preventing a 480i signal from going out on component?