New PC issues

[ZiyaadD]

A couple hours ago I finished building my PC. I turned it on and boom- RGB lights everywhere, and I was told something about an operating system. The system then turned off, and hasn't turned on since. I've checked to make sure all the cables are in the right place and have also tried to get it to boot multiple times. None of these attempts worked, I'm new to this so I'm confused. Is this normal or have I messed up?

[DobertRownySr]

Did you install an operating system?

Also, try fully powering it off, as in unplugging it from the wall.

[ZiyaadD]

36 minutes ago, DobertRownySr said:

Did you install an operating system?

Also, try fully powering it off, as in unplugging it from the wall.

No operating system installed. And just tried that, it didn't work unfortunately.

[Giganthrax]

I little bit more information about the hardware components, operating system, etc. may be helpful here. 

[Skiiwee29]

<-- Moved to Troubleshooting  -->