Question Built my first pc... seems it doesn't work.

[Swaggy]

Hello,
so I built my own pc and before running Windows or anything I wanted to check if everything seems to work. Unfortunately it soesn't.
Maybe I took the wrong approach. I connected all cables (except the three SATA cable from the PSU because I don't have HDD).
When turning the PC on, only the RGB lights go on. The fans or anything other doesn't seem to start.
Are there any ideas ? What could I do or should I do next?

 

[Laura Knotek]

Would you be able to show us a photo of the platform?

Is the cable from the monitor plugged directly into the graphics card? Some PCs won't display any picture if the monitor is connected to the motherboard rather than the graphics card.

Have you checked to ensure that everything else is connected to the motherboard correctly? Are the fans plugged into the fan headers on the motherboard?

Have you tried using only one stick of RAM instead of dual sticks? Is the RAM fully seated?