Hi, I have my pc hooked up to my tv have for years and plays sound via the HDMI lead out the tv. lovely. however its no suddelnt from one random boot never played sound again. I have uninstalled all my graphics cards (NVidia) drivers and software and all sound card drivers I have rolled back and then reinstalled (fresh) nothing I seem to do will get me sound back. I have sound out the front audio jack if I plug headphones in. I have tried finding settings to put my HDMI lead as my audio output but its not on the list? any ideas would be great im at a loss.