Could you please provide us with the following information;
- NUC model.
- Operating system.
- BIOS version.
- Driver version installed. Please go to Device Manger> Display adapters> Intel(R) HD Graphics right click on Properties and then go to Driver, you will be able to see the version installed.
- Model and brand of the HDMI cable?
- Have you tried using a different HDMI cable?
I have updated to the Intel Beta Graphics Driver and I now only get the one bing bong in the same scenario so am happy with this.
Sure, you are welcome.
If you need further assistance let us know.