Why isn’t my new pc powering on?

Okay so I bought everything to get my new pc off the ground, except I’m pretty sure I got a DOA motherboard. Please check my work so I know I actually have a bad component and aren’t stupid. It’s a Ryzen 3 1200 system using a MSI Tomahawk B350 board (which is apparently prone to being doa) and an 8gb stick of g skill aegis. I know it’s not the power supply because I tested it, and this is the only am4 board I have so I can’t test the rest of the system. The reason I think it’s the motherboard is because when I try to power it on nothing happens. No lights turn on, no fans turn, nothing. I tryed with and without a video card and nothing changed. I tryed reseating the memory, restating the power connectors... nothing. If you have any suggestions please do say something. Thanks in advanced