Roku TV showed the opening credits of a DVD and then a menu appeared listing the six programs on the DVD.  A bar highlighted the first choice.  I was unable to make the bar move down using the down arrow, and when I pressed OK I was unable to select and run the program.  All that happened was that a black bar appeared at the bottom of the screen showing the HDMI settings.  I checked the system update and my Roku system is up to date.  Any suggestions appreciated.
				
			
				
		