TV sound doesn't play through home theater system. What's wrong?

BarbraB

Honorable
Nov 23, 2013
1
0
10,510
I have a Samsung TV and a Samsung Home Theater system. I want the sound from my TV to run through the HT.
* I do not have cable or satellite. The only things on the system are the TV and the HT.
* I have an HDMI cable connecting my TV to my HT in the second HDMI port.
* I have a Chromecast device in the first HDMI port.
* I have a Digital Audio Optical cable outputting from my TV and Inputting to my HT.

I had this working once a couple of years ago, so I know it's possible. The only difference between then and now is that I don't a cable line in the TV input.

Typically to accomplish this I would set the HT to something called "D-IN", but that doesn't seem to do the trick now. I'm fairly sure the issue is in a setting somewhere and not the hardware configuration, but I could be wrong. Any help would be appreciated.