If I close the lid, pause and then open it again I will see the login screen momentarily and the mouse will work but before I can do anything it fades to black again. The screen again faded to black and then I was unable to do anything. After getting connected to the internet the problem returned.
I then did a clean install of Windows 10 and it was working fine until I started reinstalling the bootcamp drivers. I tried rolling back the OS to the previous build of Windows 10 which failed.
The problem started 2 days ago and so far I have been unable to get this working again. I have been running Windows 10 on this system for a couple months now.