Question PSU and motherboard work, but the computer won't turn on ?

[Jrv111599]

I bought a Red Dragon 850-watt RGB PSU.
I plugged all the cords into my computer, double checked everything was properly connected.
The motherboard lit up and my GPU would flicker. The PSU RGB did not light up at al,l or the fan.
I thought maybe a bad PSU so I unplugged everything and did a test on it.
The PSU RGB lit up and it's fan was spinning.
So I plugged everything back in the motherboard and GPU, yet the PSU RGB did not light back up. The motherboard lit up and GPU would just flicker again.

I don't think it's my motherboard or any of the other parts. Should I just get a new PSU or am I missing something here?

Don't know if specs help but here they are:

Specs
CASE - Corsair 5000D
MOB - ASUS ROG Strix B650-A Gaming Wifi 6E
CPU - AMD 7600x
GPU - Yeston AMD 7800XT Sakura edition
RAM - SKILL Flare X5 Series (AMD Expo) DDR5 RAM 32GB (2x16GB) 6000MT/s CL36-36-36-96 1.35V
SSD - WD_BLACK 2TB SN850X
PSU - Redragon RGPS-850W

 

[helpstar]

take some pictures of the cables plugged in, maybe we can see something wrong
upload to imgur.com or similar and post the link in here

 

[Jrv111599]

take some pictures of the cables plugged in, maybe we can see something wrong
upload to imgur.com or similar and post the link in here

Thank you for the reply.
Links are below

https://imgur.com/a/MshsOXY

View: https://imgur.com/a/MshsOXY
- Rest of connections

https://imgur.com/a/heDO5S4

View: https://imgur.com/gallery/front-cables-heDO5S4
- Front Cables