I've gone through the troubleshooting steps listed on this page of the forums: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03257712&tmp_task=solveCategory&cc=us&dlc=en&lc=en&os=4158&product=5328134&sw_lang=
Still no sound. I really don't know what to do. The product number of my laptop is C3Q78UA#ABA
Please help!