Hi Lazze,
I just now set up a couple of NUC systems with TightVNC 2.7.10 (I think you meant that one, not Tiger VNC). And, it all works just fine when I boot up the client NUC without any monitor plugged in.
What kind of system are you using for the host system to access your Brix remotely? Is it the same sort of device with the same Intel graphics driver?
Lois