Onkyo TX-SR605 conected to Mitsubishi DLP TV
What I think I did and how I fixed it!
FACTORY RESET ON EVERYTHING!
All you have to do is to do a factory reset on everything, but I thing mostly on your 605, but I would do it on the TV as well. I think what had happened is after I set everything up for the first time, it worked great. As the days when on I started to play with all of the futures the 605 and the TV had to offer. I was turning them on and off to see what everything did. What I think I did was, I turned on something in the 605 that the TV did not know how to cope with. If I had to guess, I think it is the Lip-sink feature (Spelling?) in the 605.
Anyway disconnect everything, look in your manuals of the TV and the 605 to see how to do the factory reset on both. Then turn your TV on. After it does it’s start up for the first time (again), start connecting the 605.
It has been working great for me after I did this. Do not count on help from the people you bought it from or the people who made it. This stuff is so new they do not really know how to fix it.