Question What is going on?

Dec 26, 2019
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Hi there, I've just built a pc, and it was working fine, up until a little bit ago, where it froze completely: nothing was changing on the screen, it wouldn't accept any inputs - they both stopped showing LEDs, and after being restarted, won't turn off from the power button, nor will it post.
I've tried removing the graphics card, and using the integrated graphics on the CPU. Any suggestions on what this could be? Thanks
 
Dec 26, 2019
2
0
10
AMD Ryzen 3200g w/ included cooler
Asrock A320M-HDV
Teamgroup 8GB 2400Mhz RAM (tested on another motherboard and worked)
Seagate Barracuda 1TB
Corsair VS 350 (tested on another motherboard and worked)
Radeon RX 570 (Tested on another motherboard and worked)
After some testing it's become apparent that it's either the motherboard or CPU. Unfortunately the buzzer beeps are off in the BIOS, by default. Is there any way I can check which of the two it is?