I have a 1910 with DVD, Chromecast, XBOX connected. Since we got the chromecast the DVD player has not been used so much. Recently when my daughter tried to use the DVD payer there was no sound at all. She wanted to use it then and there so I quickly switched cables and plugged the DVD into the Hdmi being used by the XBOX and it worked ok. When doing this I noticed that the display on the 1910 had blanked out and I had to hit the power toggle button. My wife and daughter haven't got the hang of the amp and it's possible they have been randomly pressing buttons. Similarly I have been experimenting with SmartRemote on my android device as a potential replacement to the Harmony remote. So two questions. Any idea on why the DVD connection would have no sound and cause the power to apparently switch off? Is there a factory reset for the Amp, I am thinking I may go back to basics and start again?