Red VGA light- PC boots but monitor is dark

[TheRomanRuler]

So i have tried all the usual methods. I reseated everything, even tried my old GPU, checked all cables, and tries to reset BIOS by pressing the button and removing battery for 10 minutes.

Now i am not entirely sure its my motherboard, i don't have other PC to test my parts invidually. Buy everything else seems to be fine, and motherboard indeed shows red VGA button indicating it can't connect to GPU. I checked all cables and everything.

My motherboard is MSI X470 Gaming Plus.
GPU is Asus RX 6600
CPU is Ryzen 7 2700x
Power supply is Corsair Rm 850

Any ideas what could be wrong?

 

[Nichrome]

Hi
Test your system outside of the chassis by placing the board on a cardboard box, do not use antistatic bag.
What RAM are you using? Have you connected all GPU and motherboard power cables?