Question Motherboard lights up, nothing else works.

rati.managadze13

Reputable
Jan 9, 2018
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4,510
So i built a new PC today and i ran into a serious problem. when i switch on the PSU motherboard RGB lights immediately light up, without pressing the power button. however. after that the pwr button does nothing. nothing seems to work: no case fans, no cpu fan, no RAM rgb, nothing. all the cables are correctly connected, no issue there. gotta note that i dont have a GPU yet, but i still decided to build the PC, as i can easily throw in a GPU when it arrives.
I would appreciate any kind of help.
specs:
ASUS PRIME-PRO x470
AMD Ryzen 7 2700x
G.SKILL Trident Z rgb 16gb (2x8) 3000mhz
WD blue 1TB 7200rpm HDD
Kingston 240gb SSD
Asiahorse rgb case fans
Corsair CX750 80+ bronze semi-modular power supply
Corsair Spec-Omega White case.