I tried to search through Google, but all the options pop-up as sound not working through HDMI. I have a case where I am connecting an AV adapter to a TV, but sound is not working for video ...
Swap the cable to another device to see if the cable or device is faulty. Inspect the HDMI for frays or exposed wires; ...
I have a brand new LG 50PK950 plasma TV, a six month old Marantz NR1501 receiver, and a couple of computers with HDMI: one desktop with integrated Intel graphics, and a laptop with discrete NVidia.