pulseaudio – No sound from speakers on ASUS Zenbook UX3402ZA_Q409ZA

Sometimes it can be that the correct channel is muted or its levels are set so low that no sound can be detected. How you can check if that’s the case, is if you open alsamixer in the terminal, and you should see something like this:
dev.to/shubhkirtisharma/fix-audio-errors-in-ubuntu-18-04-with-alsamixer-729 (sorry I can’t post an image directly, yet, without enough reputation)

Scroll down a bit and you’ll see an image depicting the screen right after the phrase “I ran alsamixer in terminal and checked if all the volumes are full or not.”

Further instructions on how to use Alsamixer: wiki.ubuntu.com/Audio/Alsamixer

Hope this helps you further! 🙂