Question Black screen, no boot, no BIOS

Jun 17, 2019
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My PC crashed recently, and since then doesn't boot up and only shows a black screen. I can't even enter the BIOS. The fans and led lights work properly. The Boot device led on my mainboard shines green, the other ones are turned of.
What could be the problem?

Specs:
CPU: Ryzen 5 1600
GPU: GeForce GTX 1070
Mainboard: Asus RoG Strix B450-f gaming
RAM: Corsair Vengeance LPX 16GB