I just replaced my X1 DVR from Comcast. The old one worked perfectly (X1, Slingbox 500). The new X1 box does not have component input and I get no video at the Sling. I have the latest Slingbox microcode. I choose 'X1' but the configurator insists that I connect components. Is there a different device selection (it is a Pace X1 according to the Comcast repairman) that doesn't require connecting the component cables? Audio works without the audio components connected. I have Windows laptop.
I have a solution to my own problem. I have a second cable box that accesses the main XFINITY X1 DVR. This second box does have all of the audio and video outputs that the Sling needs. After connecting them all I reconfigured the Sling and changed the cable box from X1 to PACE PR150NM. Currently working fine!