The case has a cable labled HD sound & a cable labled AC 97. I plugged the HD sound cable into the motherboard. I am not getting sound from the headphone jack. Nor am I getting any sound from the speakers! Is this a driver problem, possibly, or just a wiring issue? I hope it's not a defective part.
Check first if your mobo's onboard audio is enabled (this is most likely done through your BIOS) or if sound is enabled on Windows. If neither fix the problem, recheck how you installed the components inside your computer.