[HELP] Updating bios without post (Asus Prime X370-A)

[Erppa112]

Hi, i recently bought a new motherboard, a cpu ,ram and a cooler. i noticed when finished building the rig it did not post. I did everything trying to solve it and nothing worked, then i went to pc part picker and put in the parts and it said that my in the box bios needed to be updated to work with my cpu. So i'm guessing you know now what the problem is now.

I do have a USB and the newest bios in it but i do not seem to find any bios flash button or place for the usb to use to update the bios. What do i need to do?

Specs:
Motherboard:Asus Prime X370-A
CPU:AMD Ryzen 5 2600X
RAM:Kingston HyperX FURY DDR4 2666 MHz CL15 8 Gt (2 x 4 Gt)
GPU:Asus GeForce GTX 1060 6Gb DUAL OC
Cooler:Corsair H100i V2
PSU:XFX 550W TS
SSD:HyperX FURY 240GB
Hard drives:Seagate Barracuda 500gb, Barracuda 1tb, Barracuda 2tb

 

[cin19]

You can get the free cpu from AMD to update the BIOS. How to https://support.amd.com/en-us/kb-articles/Pages/2Gen-Ryzen-AM4-System-Bootup.aspx

Or go back the store you bought the parts, ask them for help, if they can update the BIOS for you.