urgent Computer just won't boot

[SQre]

So Ive just changed my cpu, psu, and motherboard because some of my components were broken from my old pc. After putting them all on again my pc booted and I managed to use it for an hour, after which it suddenly turns off by itself. After trying turning it on again it failed to boot, giving a dram indicator light for a couple of seconds then to a cpu indicator light. Please help I have class in 2 days

CPU: Ryzen 3800X
Mobo: ASUS Tuf x570 Gaming Plus wifi
Dram: Team Elite 16gb (x2)
PSU: Bitfenix Shadow 650

[Mark Kaine]

How did you even get a picture when it "worked"? the 3800x has no integrated graphics, only Ryzen models that end with a G have. 

 

[SQre]

Just now, Mark Kaine said:

How did you even get a picture when it "worked"? the 3800x has no integrated graphics, only Ryzen models that end with a G have. 

 

Sorry forgot to mention I still have my gpu, it's still working apparently