This will be a lot of work but disconnect everything from your motherboard except PSU & CPU and power on your PC.
See if the Motherboard CPU Trouble light goes off and the RAM Trouble light turns on.
If the CPU Trouble light goes on and stays on then you either have a defective CPU or Motherboard.
I then would suggest to open a AMD Warranty if your Retailer/Vendors Return Date or Warranty has expired to see if you need to RMA your processor from here: https://www.amd.com/en/support/kb/warranty-information/rma-form
If the CPU Trouble Light goes off and the RAM Trouble light goes on then install One RAM Stick and see if the RAM Trouble light goes off.
Basically by using this Troubleshooting method you are allowing BIOS to check your hardware to see which hardware is having issues.
When you power up BIOS automatically checks (POST) all the Hardware connected to the motherboard before allowing Windows or the current OS to load.
So when you disconnect everything except the PSU and CPU, BIOS will check the CPU and if it passes will turn off the CPU Trouble light and then see there is no RAM installed it will then turn on the RAM Trouble light and so forth.
Just keep adding hardware, GPU next, and so forth.
EDIT: Best way to check your processor is to install it on another compatible motherboard and see if it boots up or not or install another compatible processor on your motherboard and see if it boots up or not.