Check the Onkyo 806 review on Theater Secrets, i think it said they won't upconvert any signal over HDMI - secret drawback. Would that explain your situation?
In regards to this, all information I found before purchasing the 606, even on Onkyo's website said that it would take any input and upconvert to 1080i. It appears that this is not the case. In the manual that came with the 606 it stated that it would upconvert all inputs except HDMI. I have component cables I guess I need to give them a shot. I know that with my old native 1080i tv I could not tell any diff. If it still shows up on my plasma as 480p should I assume that the Onkyo is not doing it's job.
