This 990/7500 can't be this hard or I'm simply stupid. After accessing the menu and going through the set up I received audio via the CD player. The set up went according to my chart and all hooks ups were correct and matched. I am going direct DVD via DVI hook up to 990/DVI1. My DTV HD box is HMDY/DVI to 990 DVI2 and optical audio.Return to my Samsung HD DLP is via 990 out put HMDI/DVI to the DVI input on the display. The set reconizes the HMDI2 but screen says no signal received nor is there audio. Sattelite is working and all hook ups appear to match but no picture. Any suggestions as to why?