Same thing happens to me on a ~2 yr old OMEN 17 with a 3070. One time I actually got it to start completely randomly but then the NVIDIA drivers from RPMfusion wouldn’t work. And then the next reinstall it wouldn’t first boot again.
I’m not dual booting, so that’s not it. I’ve been using Linux 20+ years and I’ve never had problems like these. I posted my issues on different platforms since it was ignored here and basically was told it was a skill issue.
Hope the realize the issues this is causing for some users the more they post about it.
Edit: Actually looks like someone posted something potentiality helpful here (Fedora 43 KDE sometimes boots to a black screen), especially if you are booting with external monitors, but I swear I tried disconnecting them. I’ll try fresh install with no dock or external monitors when I get home.