What is in armbianEnv.txt then? Anyway you need to load and edit it such that you make sure loglevel=7 Then there will be more text after Starting kernel ...

High chance this uses some proprietary hardware for 3.5mm audio jack. It has been like that for decades and you probably need to find some firmware blob somewhere maybe. I have also a similar situation, most part s of the computer work fine with Debian Trixie etc, but it took ages to get sound working and still buggy, endless beep or crash occasionally. If you are lucky is it maybe only a mute setting or so, use aumix etc to look what is going on. Not something Armbian specific I guess, but up to you to figure out. Then also mention various versions, what BIOS/UEFI version the computer is loaded with, what Armbian kernel and also specific image release (if it is an unmodified image writer based installation).

Hi, is it still working now?

moved

@sicxnull This might be the patch that fixed it. It's in mainline u-boot now. I would use a newer u-boot. https://lists.denx.de/pipermail/u-boot/2025-March/582900.html