I recently had my computer rebuilt professionally with new CPU, MOBO, RAM as well as a new PSU. It was working extremely well for about a week to a week and a half. Then I went away for a week, I got home and played for only a few hours before I noticed it froze while playing Fortnite. I tried to pres CTRL + ALT + DELTE to bring up the control panel menu, but it was completely frozen could shut it down properly so I was forced to hold down the power button on the tower. Which I'm familiar that's never a good way to shut down a computer, but as I said that was a last resort option.
So moving on, I turned it back on and I noticed it wouldn't display anything on my monitor any more. Also, I noticed it sometimes wouldn't register my mouse. I could tell it wasn't registering even with no display because the mouse wasn't glowing. So I read that I could clean install windows 10, but I don't know how to do that with it having no display. I kind of want to do that as a last resort though. I did think I could I try to plug the monitor it the motherboard port and try to boot it like that and see iff it displays anything.
Anyways, TL;DR: My newly rebuilt computer was working excellent for a ~week or so. It completely froze while playing Fortnite and as a result it won't display anything now.