When I plug my headphones / headset into my PC, trz appears. Just the sound from my laptop. But if I plug them in before starting the laptop, they will then be recognized / play sound. What could be the reason?
USB headset?
Which Windows?
Which laptop
Aux, but ONE connector
Windows 10
First check whether your computer supports four-pin headset jacks at all.
If so, open the sound settings (right click on the loudspeaker symbol in the system tray) and check whether he has selected the headphone jack on the outside of the output device.
Or on the volume mixer, then on the loudspeaker and check whether your settings are correct.