intel nuc boxnuc7i3bnh not IP: and...

[Sergey]

Sorry, when you type the password, no keys work. Could not find information about the network chip, the manufacturer has only information Intel® Ethernet Connection I219-V adapter

Ah, the I219-V chip. There already is talk about this, try this kernel (Post #11) and see how it goes. Might also solve the strange keyboard issues you have.

Are you saying you can use the keyboard anywhere else but not in the password? Can you take a picture and show me that screen?
 

You don't see the big circles appear when you type anything? And yet the keyboard will work anywhere else? That's a strange one and hope that new kernel will fix it.
Input from the keyboard works everywhere except for entering the password at the first start of OS