My dad gave me this computer from his work, they got all new ones so he gave me one of the old ones, he was pretty sure it had a sound card.

my problem is i have no sound.
i have tried several things, i have headphones pluged into the back where the speaker port is, i have checked to make sure it is in tight, i tried to get into volume control but it doesnt let me get in, when i try to get in through the recorder, the tabs for playback and record are unaviable.

any ideas....

thanks