b450 msi

I have a B450M PRO M2. It's working fine with a Ryzen 1600 for years. Now I bought a Ryzen 5600G. Before any try I updated the BIOS to the latest version, which is 7B84v2I1. Then I installed the 5600G. It did not work. CPU led on EZ debug is ON. No video no beep. Then I installed the 1600 again...