Just loaded up the D54250WYK with Windows 10 Pre-release. No audio can be heard into the LG 42LV4400 TV through HDMI (my other computer - ACER works ok into this cable). Audio fine through the ear-phone jack. Used an Intel Tool to detect/load drivers but still no audio. It does not detect that the HDMI cable is connected. Any ideas?? Thanks in advance.
6/18/15: Update:
Incidentally, the Windows 10 Pre-release was loaded on the NUC without a prior OS installed. Since then I've loaded Ubuntu 14.10 and most recently Windows 8.1. In both cases the Audio worked fine and required no intervention. I intend to reload Windows 10 after its released. Hopefully it will work out of the box by then. Windows 10 looked better than 8.1 - so hope they resolve these driver issues.