improperly labeled HDMI output

I have an X1G-A and while the HDMI out line used to be (electronically) labeled "Xfinity", now its "STB Refsw Design" which clearly indicates this box is broken.  I have restarted (with a wait between power off and back on), replugged, restarted everything and a complete system refresh but to no avail.   This has also somehow messed up other things in my AV environment (my apple play box can not get music to my stereo anymore despite that not using HDMI, but apple box connections to the tv for control via HDMI).  Naturally the Xfinity Assistant had no clue about any of this (what a waste that POS is).  Any ideas?  How do I get Xfinity to replace this box (which is only a couple of years old but I had no choice when my 15 year old Tivo failed and Xfinity/comcast would not allow me to connect a new one).