Completely dead!

[cscs]

Without more information, such as what you installed and how, or system makeup … there isnt a lot to go on here.

I guess I will just throw this in … whether to help troubleshoot, or because you have a stanky nvidia:

Manjaro is on black screen after boot, can't login to other tty

I am going to point you to a normal/helpful routine: Then I am going to say you can skip that if I can make assumptions about you having a problematic nvidia card: If you havent sorted it - please provide system information.