Question Computer won't boot after CPU upgrade

[Bee_Marie]

I am still quite new at building pcs, but recently I bought a new CPU and almost just got done installing the upgrade. Before I even started the upgrade I had to update my bios which I followed a youtube tutorial, and it booted after the upgrade just fine. I then, again, followed tutorials to upgrade my CPU, everything seemed to go smoothly but when I finished my computer would not boot at all. No LEDs nothing. I went to put the old CPU in and it had a pin or two bent (I don't even know how) but I bent them back into place in desperation and it seemed to fit back in the slot, however it still won't boot. I've seen some threads on reddit where other peoples mono just died on BIOS update but I don't know if thats my issue. I don't know what to do, anyone have some advice for me?

new cup : Ryzen 9 5900X

Mobo : Gigabyte B450 Elite

Cpu cooler: NZXT kraken z73

gpu MSI GTX 1660Ti

psu corsair SF750W platinum