Sometimes HDMI Playback devices get disabled ... Similar to how we updated the HD audio device drivers, we can update the display adapters. Open Device Manager and expand the Display Adapters ...

If you recently updated the audio driver and then this issue started, then maybe you want to roll back the driver to the previous version and see if that helps. Sometimes ATI HDMI Audio device can ...

The Nvidia High Definition Audio driver supports a variety of audio formats ... capable monitor or a TV connected to your GPU with an HDMI or DP cable, then you can set up Nvidia High Definition ...

HDMI audio drivers are included with the graphics driver available for your Intel NUC product.