When I connect my television to the laptop via an HDMI cable, I no longer have sound on any device - what could be the reason?

If I cut the connection between the TV and the PC, I have normal sound on the PC again.

I can set the output under sound settings on the PC.

It actually works automatically for me, but you may have to go there manually.

For example, right click on the loudspeaker symbol in the system tray and then you can go to the settings.

Win, Linux or Ios?

I've already tried everything possible, can you explain it to me in more detail? Where can I find the option with the output devices?

I did it, that means not output devices but playback devices (for me).

Win, but already done.

With pleasure.

Do you have sound on the TV now?

I turned it off on the TV because I always have headphones on anyway.