Hello HTG-I don't know if the following will help; since I don't know your particular seturp. I bought my daughter a 2310 for her system-it was installed in a closed back cabinet with about two inches clearance on top and sides. After a week it began changing inputs on it's own-never went into an overheat condition. We took it out of the cabinet and put it on the lower leverl of a "free air"table-at least 12" clearance on all sides. The move was made 10 months ago and there has never been a spontaneous input switch since.
As i said, don't know the partciulars, of your setup, but ventilation, or lack of, can cause some mysterious problems without the unit going into a "hard" overheat condition. I am an ower of a 4311.
There is an abundance of clearence around the unit. It is inside a credenza and unit is setup as a pre-amp but I will check for heat next time I have it on all day.
Yup ... covered in my Troubleshooting section.
Thanks for the replies AJ and JD, It is a refurbished unit from A4L and I hope you are both wrong. It was bought just last month. Since I do not have anything hooked up to the DVD inputs do you think it would help to delete that source from the GUI?