New build issue

[Saltypigeon]

Good evening (UK folk, Afternoon other folk)

I have a small dilemma, So i've recently gotten a ton of new components for a fresh build and run into a slight issue, I assemble everything and click the power button and have nothing. 

RGB light and the orange board light are active but nothing more.

Also tried two Power switches.

Made sure cpu is sat right.

All motherboard connections have been set correctly and checked over 10+ times.

 

Can anyone shed any light on this for me.

 

MOBO: Asus ROG Strix B350-F

CPU: AMD Ryzen 7 1800x (MSI L Frozr cooler.)
PSU: Corsair 750 CXM
RAM: Corsair Vengeance 2x8GB DDR4 2666MHz

I will note i understand AM4 dont have onboard GPU and im yet to try it with a GPU (not yet got it)

[Cigano]

the thin power switch cable leading from your cases main power button is only a single pin connection so it's really small you're sure this single pin connector is in the right spot on your motherboard? look in your motherboards instruction booklet just to make sure 

[Matias_Chambers]

The motherboard lights turn on? Do any fans start spinning? You wont have and output to the screen without a GPU.

[Saltypigeon]

Sorry my fault for not adding that, So none at all. No psu fan spinning, No CPU fan spinning either. 

[Dissitesuxba11s]

Did you connect the EPS cable on the top left of the motherboard?

[Saltypigeon]

1 minute ago, Cigano said:

the thin power switch cable leading from your cases main power button is only a single pin connection so it's really small you're sure this single pin connector is in the right spot on your motherboard? look in your motherboards instruction booklet just to make sure 

I have done yes, It's in the correct position.

[Saltypigeon]

Just now, Dissitesuxba11s said:

Did you connect the EPS cable on the top left of the motherboard?

I did yes.

[Dissitesuxba11s]

Have you tried these:

-Reseating RAM, making sure it's in the right slots. See motherboard manual.

-Reseating motherboard, to make sure it's not grounded.

-Booting with only one RAM stick.

-Making sure the CPU cooler is not too tight.

-Check to see if the CPU Ready green light is on when power is going through the board.

[Saltypigeon]

2 hours ago, Dissitesuxba11s said:

Have you tried these:

-Reseating RAM, making sure it's in the right slots. See motherboard manual. - No change

-Reseating motherboard, to make sure it's not grounded. - No change

-Booting with only one RAM stick. - No change

-Making sure the CPU cooler is not too tight. -Took the cooler off just for testing but still plugged fans in.

-Check to see if the CPU Ready green light is on when power is going through the board. - Power goes through board, RGB flashes and orange board light but the fans on PSU just wont spin and transmit anymore power through.

 

[Saltypigeon]

Thanks for the suggestions, Unfortunately on this build the manufacturer refunded me due to the bios not updated to the one i needed, The poor customer service from the seller made me get a refund rather than swap it.