sound – No Audio on Dell latitude 3410 with ubuntu 20

I’ve just installed ubuntu on my dell latitude 3410, but I cant get the audio working.
In the config, the audio output device says something like “fake output” and I see the bars moving when i play something on youtube. But there is no sound. Neither connecting the headphones. can anyone please help me? I’ve done this:

sudo apt install alsa-tools-gui
Run hdajackretask
Parser hints > jack_detect = no
Apply now
Install boot override

BUT in the left part of the screen there is message: “No codecs found”
Son I cant click “apply now” and “install boot override”

Thanks in advance.-