I have looked everywhere and I can't fine it. But I am sure it has a SPDIF output because it is on the system specs. http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00378480&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=1847035
Now if one of you guys can just describe where the pins are? Or maybe a picture to show me would be really nice too.