Suddenly Issue with Analog output

Suddenly after few month OK my analog output is no more OK
I m running Rasperry PI2 / OSMC

all was ok yesterday… I did no change.

Now i’ve twinkled all configuration and still no sound

to be sure I took my previous rasp PI and plugged it on Analog Jack input of SOund system and all is ok.

How can I reset ANlog or test it ?

many thanks