OK, open a terminal, log in as root, and type:
Look for any entry that has snd in it. There should be three or four of them (mixer, etc.)
By muted, I meant through alsamixer. Many times, sound is muted by default on a new installation. From the terminal, type:
This will open a text-based graphic should the various channels of your sound card. The master volume control should be the first on the left. You can navigate the channels with the arrow keys, and change entries with the space key. Just make sure the master volume is not muted. Also, the name if your sound card should be shown at the top.
These things usually solve sound problems, but if it doesn't, there are other things you can try.
Bob