TV Box/DVR color coded status condition
When I speak to a Comcast rep on the phone they will often mention the status color of my DVR is in the yellow or in the red. Then they make some refresh adjustment and then it is back in the green. So my questions are, 1) what exactly do these colors refer to? 2) Why does my DVR move from a green to a yellow or red? 3) What can I do to prevent my DVR from varying from red? 4) What exactly is the tech doing when they "fix" my system?