My NUC-HTPC running Win 8.1 (64bit) connected to an LG television is having audio problems with a Yamaha soundbar.
The setup is very simple:
connected via HDMI to
connected via optical cable to
If the NUC is started when the Soundbar is already powered on, then Win 8.1 will not recognize any audio device (red x on the speaker icon).
However if the NUC is started and the Soundbar is powered on AFTER Win 8.1 has loaded (e.g. KODI/XBMC is up), then the system is able to play sound via the soundbar.
What's the problem?
What is the Intel® NUC model?
What is the BIOS and graphics driver version?
Did you check for firmware updates for your soundbar?