Question BIOS / Computer doesn't boot after BIOS update

Aug 24, 2022
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Hello, I have a problem with my PC a friend recommanded this forum so I'll explain you everything. Thank you in advance for your time !

Motherboard : Asus PRIME X370-A
CPU : AMD Ryzen 5 1600 (3.2 GHz)
GPU : Asus Radeon RX 570 ROG STRIX OC, 4 Go
RAM 1 & 3 : DDR4 Ballistix Sport LT, Red, 2 x 4 Go, 2400 MHz, CAS 16
Ram 2 & 4 : DDR4 T-FORCE Vulcan Z, Red, 8 Go (2 x 4 Go), 2666 MHz, CAS 18

My friend gave me his old AMD Ryzen 5 3600 so a huge improvement over my old R5 1600. But to use it I needed to update my BIOS, I went to Asus website and downloaded the version compatible with the 3600 and the download gave me the version "6042" https://www.asus.com/supportonly/PRIME X370-A/HelpDesk_CPU/

I did the update in my BIOS with the .cap file on my FAT32 USB and it was a succes ! "Update succesfully ! The system will now reset" and then... nothing.
I waited 1h and still nothing, so I tried to reset the CMOS but nothing, same when I changed the CPU with the new one.

What can I do ? The computer start, there are the lights, the fans etc but that's it, nothing on my monitor.

Thank you in advance, I don't what I can do after all of this.