Is that “small black hole” for a 3.5mm jack (i.e. like small headphone jack) or something different which may be connector for optical cable for audio. Photo would be useful.
Have you opened alsamixer in terminal and checked that none of the sound outputs are shown muted?
(I am using Z15.3 Core so not sure if alsamixer is included in Lite)
Also see this thread which may help:
I’m running Zorin Lite 15.3 on an old HP Pavilion, which has SVGA and HDMI output. When I connect to a projector via HDMI, the image output works, but not sound. There’s no HDMI option in the sound menu, even when connected. I’ve tried with two different projectors, with the same result.
I tried the solution offered
here but when I try to install Pulse Audio Manager, I get "Package ‘paman’ had no installation candidate’.
The latest versions of ALSA, Pulseaudio and pavucontrol are already insta…