Sound output without picture via HDMI from PC to TV?

Question

Audio

The backlight of the TV, which was the second monitor, burned out, and the image disappeared. The trouble is that there are no speakers on the main monitor. Is it possible to somehow output only the sound, without the picture on the TV?
Not suitable: monitor duplication, because the main monitor is 2k, and the TV is HD. Because of this, all games run only in HD resolution. There is no way to set up the TV either, nothing is visible on it.
The option to leave it as is (an extended monitor) is not suitable, the mouse leaving the edges strongly interferes.

Answer 1

The option to leave it as is (an extended monitor) is not suitable, the mouse leaving the edges strongly interferes.

Just place the second monitor in the corner of another and it will become very difficult to get there with the mouse. I recommend the top left one. Like this.

Answer 2

The solution is to stop doing nonsense and connect the sound through an analog cable. Without an iron splitter, you can't do it. Although, you can try to disable the monitor (which is the TV) not in the video settings, but in the device manager. The result is not guaranteed.