no sound through speakers or front panel headphones?
did you check in the bios,onboard devices/sound that its set to hdaudio or ac97? set it to whatevers printed on the front panel audio mb connector block
right clicked the speaker icon/playback devices while playing music to see if any of the green bars dance up and down indicating sound should be heard?
also make sure azalia codec/onboard sound is enabled in bios,if it isnt no sound will be heard