I restored a Libreelec made backup on RPi3 to the new RPi4.
(both running same, current Libreelec)
Backup/Restore worked perfectly.
I cannot get the audio over HDMI to work anymore. I suspect it died after the restore.
The odd symptom is:
While the Kodi is quiet, adjusting volume animates the volume indicator.
While playing a video, (so sound is heard) adjusting volume shows no change on the indicator.
Maybe a RPi3 related setting/file were restored ?
How should I troubleshoort?