AMD Ryzen 5700x upgrade - Not Booting

My son has an X570 Phantom Gaming 4 motherboard with 32gb of memory and an AMD Ryzen 5 2600 chip. (the system was working fine)

For Christmas, I bought him a Ryzen 7 5700x proc.
After installing it, the pc would not boot. It was throwing red led's on the ram light.
I purchased 32gb of Corsair Vengeance LPX 3200MHz memory, and it still will not boot.
The board is up to the latest firmware.
I have reset the CMOS as well, and no luck.

Can anyone help?

TIA,

Tom

Tomr2024 wrote: Just to clarify, the BIOS has been flashed to the latest 5.50, and it still does not boot.

bios needs to be updated with ryzen 3000 or above, its written in bios description

there is a workaround
https://download.asrock.com/TSD/Ryzen5000/X570%20Phantom%20Gaming%204.pdf

Edited by kerberos_20 - 09 Jan 2024 at 8:07am

When using a 2000 or older series CPU the BIOS flash does not work correctly.
You need to update using the workaround kerberos_20 shared. The system should still
function with the original 2000 series CPU so you should be able to follow the
workaround to sort it out. If not, try opening a support ticket with ASRock:
https://tw.asrock.com/events/tsd.asp