Desktop Power Not Working

[A4N0NYM0U52]

I’m getting kind of desperate here. I have my RTX 3070 TI and I started the installation earlier today. I began removing power cables to make space. I fucked up a cable, USB 3.1 Adaptor for my mobo. I was able to fix it, and I got my PC together. It’s not booting, nor is the power working for it. I tried redoing all the power cables, checked the power buttons and stuff, looked at the PSU and the cable configuration, and checked the wall socket. I also checked the RAM, CPU and GPU. Everything seems to be in working condition yet it’s not delivering power. I have a 

Motherboard: Tuf Gaming X570 Plus Wifi

CPU: R 7 3700X

GPU: RTX 3070 TI

RAM: Corsair Vengance 32 GB 3600MHZ

SSD: Intel 660P 1TB, Kingston 250GB PSU: Corsair RM 750 2018 Gold+

[A4N0NYM0U52]

Jesus, I wrote this badly