Bought an NR-616 about six months ago and was having occasional issues with the HDMI TV port. It took three months for the receiver to stop working.....no TV signal. I returned the unit and replaced it with a brand new NR-616. Three months, almost to the day, same problem. I worked with product support for a couple of hours and they were unable to remedy the issue. I returned that piece and bought an NR-717. Two weeks after hook-up I am having power problems. I power the receiver on and it shuts off five seconds later. Called product support and was told to unplug the HDMI cable and shut off electricity to the receiver for at least an hour. I left it off for eight hours. Tried to power on the receiver....no luck. Shuts off five seconds later. Anyone experience the same problem? Or, am I just lucky to have three defective Onkyo receivers in a row?