no sound thru TV

A

AC Question

I recently bought the Chromecast2 and installed it. I have no audio and I believe that the problem is that I have my TV hooked up to an entertainement system (separate amp and speakers). I hooked up the device to the TV as instructed, but I guess it has to go through an extra HDMI of the amplifier and not the TV. I am correct? Please help
 
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