I have tried various solutions offered here and elsewhere and nothing seems to help. A new problem that has come up, is that now the HD TV no longer shows up as one of the options in Control Panel - Sound. I understand I should disable the realtek HD audio on the BIOS, but this wont change the fact that the HD TV no longer appears as an option. Any way to get it to come back, and once that is done, get the sound to work? Last time it was available I set it as the default device, restarted, and it still didn´t work. I disabled and reenabled it in device manager again but still nothing. Any ideas?