My pc wont boot up

[Jkalekat]

Hello ltt forums so I decided to build a new pc.i got all the parts they are ryzen 3600, gigabyte aorus b450m 16gigs of ddr4 ram a m.2 and a rtx 2060 . So my problem is that when I assembled my PC on motherboards box connected to power supply it won't boot note I did connect 24pin,a atx 12v pin with PSU CPU pin and a pcie with the rtx.my PC won't start but when I remove the 24 pin and CPU pin and Terry to jumpstart it boom powersupply's fan works my rtx displays the LEDs plz help and tell possible reasons for it to not boot up

[Worstcaster]

Is the BIOS updated?  A Ryzen 3000 series CPU requires a BIOS update to run on a B450 board.

 

If that is the problem here is a list of solutions from AMD.

 

https://www.amd.com/en/support/kb/faq/pa-100

[Jkalekat]

 

It is

[Worstcaster]

It could be the CPU or MOBO (statistically the MOBO is the more likely option) is bad.  Attempt to exchange them and see if that solves the problem.