HELP HELP PC not starting up

[Blastcakegaming]

I checked all the power connectors, power button and it wont start. The only thing I'm worried about is the power connector to the motherboard doesn't click into place on one side.
Specs:

Mobo: Asrock 907M PRO3
CPU: FX 6300
GPU: Sapphire r9 280
PSU: Corsair Cx500
HDD: WD BLUE
Case: Zalman Z11 Plus

 

[syked3]

What RAM do you have?

 

[Blastcakegaming]

Kingston Hyper x Fury 2x 4GB 1866MHZ

 

[syked3]

Kingston Hyper x Fury 2x 4GB 1866MHZ

is this a new build? Also when you say its not starting up, do the fans spin for a little or does nothing power up at all?

 

[Blastcakegaming]

its a new build and there is no sign of any powering on

 

[syked3]

its a new build and there is no sign of any powering on

first things first, have you checked all the psu cables are installed correctly (24 pin, cpu, gpu)? If all that is fine, quickly check to see if your PSU is working, you can do this by following the steps in this video:https://www.youtube.com/watch?v=5FWXgQSokF4