Pc Build won't start up

[Brocco Boi]

So I put all my pc components together this morning and I am now at the stage of starting up, but it won't. My ASUS motherboard does show some lights, but those are completely aesthethic. The lights do show that the motherboard has power. I have moved my 2/4 stick of ram from the correct slots to different ones, but that wont help. I've removed my gpu, no sign either and double checked the front panel connectors, I have tried a screwdriver too instead of the powerswitch, still nothing would happen. I have also checked my 24-pin connector and my 8-pin cpu connector, no signs of life in my pc. Anybody got an idea on how I should fix this? Thanks in advance.

 

[Nocte]

Did you mount the motherboard on the case stand-offs or did you just screw it in?

[Brocco Boi]

I put the case stand-offs in and then put the screws thru the motherboard holes into the stand-offs