I have a nuc d54250wyk. It is connected directly to my Samsung tv ua55hu7000 via hdmi which provides the graphics and audio.
The nuc is used as a HTPC
I leave the nuc on permanently but turn off the TV when not using it. When I turn the TV back on, the audio sources are lost and a red Cross is placed across the sound icon at the bottom right of the screen. I need to reboot each time I want the audio to start working again.
This seems to be a recognised problem. See here: https://communities.intel.com/mobile/mobile-access.jspa#jive-content?content=%2Fapi%2Fcore%2Fv3%2Fcontents%2F162237
It does not appear intel has a solution or is taking steps to address it.
People have suggested hdmiyo and to turn off anynet cec on the TV. Both suggestions do not work.
I am very disappointed with this given the money and effort gone to with this nuc
Intel, please confirm there is a workable solution now in place for this problem