Has the sound ever worked?
Are the speakers plugged in?
Yes, tried 2 sets of different speakers
Are the speakers connected to the right port?
Is the volume turned up in both Windows and on the speakers?
Is the volume muted?
Did you check to see if "Wave" is turned up by double-clicking on the speaker icon in the tray?
Just checked, it isn't mute, turned all the way up.
Anyway, the board is an nforce2 chipset.