I moved and Cox upgraded me to a Cisco 9865HDC cablebox. I have an HDMI cable to the TV and component connections to the Pro-HD. I can connect to the Slingnbox with no problem, but all I get is a "No Video Detected error". I disconnected the HDMI to the TV but still got the same error.
I can get video by disconnecting from the cablebox and plugging the coax cable (quality is terrible though and all I get are the analog channels) directly into the Pro-HD.
I had no problems with the previous Motorola cablebox using the same setup and got great quality.
Is the 9865HDC not supported? I don't see a remote for it either.