Thank you for joining the Intel® NUC Community. I am sorry to hear you are having a loud noise.
Could you please let me know the BIOS version you have installed?
In the meantime try the following, access your BIOS configuration and press F9 to load the default settings.
Can you describe the loud noise ?
working mode is good
I resets setting by F9. But I still hear the noise.
Thank you for confirming this.
Please try the updating the following components:
- Intel® Chipset Device Software for Intel® NUC Kit NUC7i3BN, NUC7i5BN, and NUC7i7BN: https://downloadcenter.intel.com/download/26801/Intel-Chipset-Device-Software-for-Intel-NUC-Kit-NUC7i3BN-NUC7i5BN-and-NUC7i7BN?product=95067
- Intel® Management Engine Consumer Driver for Intel® NUC Kit NUC7i3BN, NUC7i5BN, NUC7i7BN: https://downloadcenter.intel.com/download/26482/Intel-Management-Engine-Consumer-Driver-for-Intel-NUC-Kit-NUC7i3BN-NUC7i5BN-NUC7i7BN?product=95067
- Realtek* High Definition Audio Driver for Intel® NUC Kit NUC7i3BN, NUC7i5BN, and NUC7i7BN: https://downloadcenter.intel.com/download/27126/Realtek-High-Definition-Audio-Driver-for-Intel-NUC-Kit-NUC7i3BN-NUC7i5BN-and-NUC7i7BN?product=95067
Please let me know how it goes.
Like others, I noticed that the sound is in sync with the NUC power light blinking on and off. I would "guess" that your volume control is set fairly high at least for the video recording. It sounds like digital noise being coupled to the speaker via either by the NUC audio input line or the NUC USB power connection.
I would suggest two experiments to gather additional information:
1) Does the noise disappear if the USB connector is unplugged? Perhaps the NUC USB port is remaining powered in the sleep mode. If true then a fix might be to use a non- powered NUC USB port. Normal NUC operation would power up the speakers upon waking.
2) If possible, can you plug the speaker USB cable into an external USB power supply (+5Vdc)? Such as an external powered USB expansion adapter. If the sound disappears then noise is getting into the speakers via the +5 volt usb power.
It could be that the power line filter capacitors internal to the speaker have failed. Trying an alternate speaker may give more insight into the issue.
I connected the speakers to an external power supply. The noise was gone.
Has the USB a defect ?
From your test results I would guess that the NUC USB port is acting "normal" but NUC processor noise is coupling on to the +5 power pin that the USB port supplies to external devices. Since the NUC is so small I would think that INTEL does not provide large enough filter capacitors on the USB power lines. Making things worse, the amplifier internal to the speaker probably does not have much filtering on the same power lines.
It seems to me there are at least a couple of different approaches you could take:
1) I don't know which NUC you have but if there is an USB port on it that switches off the USB power during sleep, you could plug your speaker USB cable into it. The NUC would power up the speaker when it wakes up.
2) You could add additional capacitor filtering in the Speaker on the USB +5V power line. Perhaps a 0.1uF for high frequencies and 10uF for lower. Trial and error approach.
3) You could buy for a couple of dollars off ebay and externally powered USB distribution hub. The speakers could then get clean power and you would have a few more USB ports. Always a handy thing to have. This is what I use on my system.
By the way - make sure your operating system volume control is turned up to a moderate level so that you do not have to set your Speaker volume control at an abnormally high setting. I try to use mid range on each. If one or the other is set at an extreme, it makes the problem harder to deal with.