No sound on Bravia TV (2008)

I have an old Sony Bravia TV where I can use LibreELEC-RPi2.arm-10.0.3.img on a RPI2B+ or a RPI3B . But for some reason if I use an allwinner (LibreELEC-H3.arm-10.0.3-orangepi-pc.img) I can never get any sound out of it.

Is this something known ?

jernej I'll try again but TV set is at a friend's house, so it may take a while for me to try.