I just bought the 7.8 acouple months ago, so I am very interested in your problem. I never mess with the automatic speaker setup, I fine tune to my ears later. What is your sound source, and how do you have it connected to your integra input. Have you assigned your speaker configuaration? If you hit the mute button accidentally? Do you see your speaker configuration on the front display, and in the 2. Speaker Setup, 2. speaker config menu. Make sure to cancel the automatic speaker setup while trouble shooting. I would bet it is not DOA, Integra is top of the line.