Question New motherboard not turning on!


Aug 20, 2019
Hello everyone!
I would appreciate your help, i am going crazy with this... I just updated my old pc, bought a new motherboard, processor and Ram.
The motherboard is: Asus PRIME B560M-A LGA1200 and the processor is an Intel Core i5 11600KF
Now I connected the new motherboard, the 24 pin and also the 8 pin one from my power source and nothing happens. Not even the LED from the motherboard is turning ON, like theres no power at all getting through...
I know the power source works, on the old motherboard it was working without an issue, may it be it needs more power? motherboard may be faulty? something I missed?
Please help.
Best regards