Help with getting b550 system to post

[LSD-J]

I can't get my system to post at all. The motherboard light is on, the CPU fan spins but that's it. No output from the GPU on either DP or HDMI, on either of my monitors. The system won't post with any CPU I have tried, which includes a 5600g and 3400g ( I know they require a bios update but I can't do that), and a 3100 (which should work out of the box). I removed the cmos battery overnight and tried again, no luck.

 

Motherboard: Asus b550ma prime

CPU: various as stated above

GPU: rx 6600

Ram: 2x ddr4 Corsair vengeance lpx

PSU: 550w flower something (idr the brand but they're evgas oem).

 

Each CPU was pre-owned but bought from vendors, everything except the ram is newly bought.

 

Everything in my head is saying it's a motherboard problem but I can't think of what, or if it's anything else. Any help would be appreciated, this has been my hell for 2 weeks. Thank you.

[MiszS]

Did you test each ram of stick in each slot?

[LSD-J]

33 minutes ago, MiszS said:

Did you test each ram of stick in each slot?

I had tried in b2 and b1, just tried in a1 and a2, same result.

[LSD-J]

So I bought a new stick of ram today and it worked. Meaning my old PSU killed 3-4 components of my system. Fucking yay.