Question Just built PC turns on but only displays black screen.

Aug 23, 2019
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I just built a brand new PC and when i first plugged it in everything powered on and it displayed a screen saying to enter a boot device and i entered a usb with windows on it but nothing happened so i turned it off and back on again because i thought i had to hold delete during power up to get to the bios. Once it booted up again it only displays a black screen. It wakes up my monitor so there is some sort of source to it. All Fans are running including gpu. i emailed ASrock customer service but i assume they wont be of much help.

Hardware:
ASrock 570 phantom 4 gaming motherboard with wifi
corsair ram
ryzen 3600 cpu
rx 5700 gpu