I've also had this problem in Hyper-V.
In my experience a black screen means you may need to use the framebuffer driver which is not installed by default.
At the black screen, type:
ALT-F5
To get to a console.
Then login and install the FB driver:
pacman -Sy xf86-video-fbdev
systemctl restart display-manager.service
But if you can't even get into a console then this probably isn't the problem.
It's more likely you need to disable KMS.