Here is my basic system configuration:
OS Name Microsoft Windows 10 Pro
Version 10.0.17134 Build 17134
System Model NUC8i7HVK
Processor Intel(R) Core(TM) i7-8809G CPU @ 3.10GHz, 3096 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date Intel Corp. HNKBLi70.86A.0040.2018.0516.1521, 5/16/2018
SMBIOS Version 3.1
Embedded Controller Version 255.255
Installed Physical Memory (RAM) 16.0 GB
Storage Samsung SSD 970 PRO 1TB
Note that I have installed the latest BIOS and audio drivers.
The two outputs I am connecting to are 1) Samsung TV Model UN40MU6290 with the latest software update (connected via the rear HDMI port using the most recent HDMI cable standard), and 2) Amazon Basic Speakers Model BOOGHY5F3K (connected via the front audio port).
1) The problem with the Samsung TV connection via the rear HDMI port is that no audio is being transferred. The video works fine. When I run the same HDMI cable via my Acer Desktop computer to the same TV, both the video and audio work fine. Numerous other NUC users have reported similar problems in your support forums, with inconclusive responses from Intel support staff.
2) The problem with the Amazon Basic Speakers connection via the front 3.5mm audio port is a hissing sound that overwhelms the desired signal. The speakers work fine when I connect them to my Acer Desktop computer. The same problem also occurs when I attach headphones to the 3.5mm audio port. Again, other NUC users have reported similar problems in your support forums, with inconclusive responses from Intel support staff. Unlike 1), where no signal comes through, the signal in 2) is discernible. But the overwhelming hissing sound makes listening extremely unpleasant.
The combination of both these audio problems makes my NUC all-but-useless. My first choice is to be able to play both video and audio via my TV. Only when the audio didn't work in that context did I go out and buy the Amazon Basic speakers as a potential work-around. There are other potential workarounds--e.g., using the USB and optical audio ports--but they tend to get more expensive and inconvenient to test. My view is that I should be able to get either the HDMI or 3.5mm audio port to work the way they are supposed to.
I believe the most efficient way to address these problems and work through potential solutions would be via a phone conversation where I could quickly address your configuration and other questions. But I would also be grateful if you'd answer my questions within this written forum.