Quote Originally Posted by DaLiu
Check in BIOS if on board audio is enabled.
yes...in BIOS it's enabled, but it behaves as if it were not involved

Quote Originally Posted by Kayso
Have you connected it to the right port ? Because if not, it doesn't work at all
Look at the attached image.
yes, I have put it there

Quote Originally Posted by koksy
Did you remember to install the drivers?
drivers can't be installed, because system can't find sound card