Ok if you open a terminal, enter the following command:
This will open something that looks somewhat like a graphic equaliser. There should be an option to press F6 to select sound card. See if there is another device to switch too (probably HDA Intel), change to it , hit esc to exit and close the terminal. See if your sound is working now.
"The darkest souls are not those which choose to exist within the hell of the abyss, but those which choose to break free from the abyss and move silently among us."