We are using the rectangle led on NUC6CAY to show system status to customers. Now I noticed that NUC7CY* miss this feature and show a little HDD led instead. Is it possible to change setting in bios to "software control" this led?
I understand that you would like to know if it is possible to change the HDD LED setting to work with "Software Control".
Regarding your question, first, I would like to start by saying that you are correct, in the model of NUC you have there is no ring LED. However, it is possible to change the way the HDD LED behaves, you can actually change it to software control by going to the BIOS > Advanced > Power and then scroll down to the HDD LED, select the desired option and it should work the way you need it to.
I hope you find this helpful.