Good to know.
That means you’re able to use some of the links given by @Aragorn which might help.
I’ll add a few more that might also be useful;
- Basic Manjaro Linux Rescue and Recovery
- Recovering from an interrupted update/upgrade
- Resolve an unbootable Manjaro (black screen, login failed, cant boot, etc)
In the meantime, please provide system information as described (below) and anything else that might help others to help you.
Regards.
System Information
While information from *-fetch type apps might be fine for someone wishing to buy your computer, for Support purposes it’s better to ask your system directly; 
Output of the inxi command (with appropriate parameters, and formatted according to forum guidelines) will generate useful information for those wishing to help:
inxi --filter --verbosity=8
or the short form:
inxi -zv8c0
- inxi man pages (Arch Manual)
Be prepared to provide output from other commands whenever asked. It’s equally important to provide as much actionable information as possible in your first post, rather than simply indicating there is a problem.