There is a 'hidden' diagnostic menu (blue) for comcast cable boxes and others. It is usually accessed by turning off the box and pressing menu or guide/help buttons and it gives info on resolution and other HD settings for the box. I was always able to bring it up but now can't, on BOTH of my boxes. EIther get a black screen or 'not supported.' I already talked to 3 people on the phone who didn't have a clue about this. And when they start telling you to check the connections, you know it's time to hang up. Anyone ever have this issue and how to fix? Comcast tech support is Useless.
After I posted this I jsaw there are a ton of issues/questions on here that get 0 replies...oh well.
Solved! Go to Solution.
Me too. I have an RNG 150N and cannot access the cable box menu using the XR2, version R1.
Do you have the X1 system or Legacy Cable?
For Motorola boxes, you hit OK or OK/Select within 2-3 seconds of turning it off for the full diagnostics. For configuration (resolution, etc...), you hit MENU when it's off (no time limit.)