No power to monitor, keyboard, mouse, or flash drives. No POST.

Jun 22, 2018
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The PC turns on, restarts after 5 seconds, then remains on. This is my first build. Fans, LED, power switch, reset switch, hard drive, graphics card, and CPU seem to be running. Cannot get POST, as I cant get the monitor, keyboard, flash drive, or mouse to connect. Priory to this, the mouse, keyboard, monitor and flash drives DO work. I believe I set up everything correctly.
CPU: AMD Ryzen 3 2200g
Motherboard: ASRock AB350 PRO4