Thank you for joining the Intel communities.
Do you have the latest BIOS version?
What operating system do you have installed?
Please let me know I can try to replicate the issue.
Latest BIOS v44 of course.
I have installed OpenELEC and Windows 7 but it's not OS related as the noise is present BEFORE OS is ready.
This background "noise" sound seems to be heard until OS has takes the lead on the audio chip.
I'm sure you can replicate the issue with a simple headphone plugged in the rear jack connector.
I have the same on my D54250WYK.
Like a bass peak when rebooting but also cold booting - and a noise level in the background.
Rumours has it that it can be due to "faulty" external PSU which Intel provides with the package.
So the question might be if you use the external PSU which was provided by Intel or if you use a different one?
If you use the one which was included - do you have another external PSU (with the same settings) which isnt from Intel (well the Intel provided one is from FSP Group if I recall it correctly) which you could try with your NUC and see if you get a different result?
In your case check the docs over at https://downloadcenter.intel.com/download/24956/NUC5CPYH-NUC5PPYH-Product-Documentation-Manuals regarding which settings the external PSU should use.
Also, the current downloads seems down - anyone who knows if the powerpin used by NUC will provide analog earth (ground) or not, or is it a earthless/groundless powerconnector which is being used between the external PSU and the NUC itself?
Some references that you are not alone:
So the theories are basically:
- Something is bad with the external PSU provided by Intel (I think its from FSP Group).
- Some sort of groundloop (which doesnt really fit since this occurs also on speakers directly connected to the NUC).
- Bad EMC/EMI design within the NUC (some internal component is injecting noise into the soundchip or the soundschip is badly shielded and accepts noise).
- A variant of above could be that the noise is somehow injected externally, like bad shielding of the chassi or something affecting the external PSU (try to move your NUC to different location including the external PSU and see if that helps).
I have tried to replicate this issue but I was not able to hear this noise that you all are experiencing, I tried it with the Intel® NUC5PPYH and the Intel® NUC5i3RYH but the systems starts normally and I did not hear any noise.
Even though I did not have the same problem I will forward this case to our engineering department for further investigation.
Thanks for all you feedback and your patience on this issue
I work for Intel Customer Support and I received this concern from ivanu_intel.
We both tried to duplicate this issue and also requested some other engineers to try at a different locations and running different hardware and we all were unable to duplicate this issue.
I am not implying that the issue doesn't exit (it is also very clear on the YouTube* video - VID20150323142843.mp4 - YouTube) , I am just saying that it could be something external to the NUC, perhaps interference from an electrical source.
I would like to encourage the "community" experiencing this behavior to try to isolate this issue and post their findings here.