Question ASRock x570 won't post

[ksac62]

Built my PC and it worked fine. Got windows running and used it for about an hour then screen went black and it will no longer post.
When I turn on the PC the lights and fans turn on but the screen stays black. (Not a monitor problem I checked) the CPU and dram red LED lights come on for a second then the boot light comes on and stays on. Any idea how to fix this?

Build details:
ASRock x570 phantom gaming 4
Ryzen 7 3800x
Gigabyte rx 5700xt 8gb
2x8gb Corsair vengeance ddr4
Corsair rm750x fully modular 750w psu
Wd blue 500gb m.2 SSD
Seagate 4tb hdd

 

[losmi-bb]

Hey,

The same thing literally happened to me on that board with 3600x. Did you figure it out?