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I was trying to change the resolution of the picture and was in the settings section using the...

I was trying to change the resolution of the picture and was in the settings section using the remote. I don't remember exactly what the selection was but after I selected it and hit enter the tv went blank for a few seconds and then nothing but a blue screen with the floating words 'not support'. Nothing I've tried will allow me to get back to the menu. No buttons on the remote work on the DirecTV box. I unplugged the box and it reset the satellite connections, but then the blue screen with 'not support' appeared again. Help! How do I reset the HD DVR box?
Chuck asked this question 1 year ago