Question upgraded cpu on my b450f II now white light and pc wont boot

[maged300zx]

i have updated the bios to the latest version; 4901. I switched the CPU back and the pc turned on just fine. when I reinstalled the new CPU the same issue occurs; white light and no post at all.

 

[Nephern]

So what brand is your mobo, also what CPU did you install into said mobo?

 

[John Chesterfield]

Nowhere near enough information, we need FULL system specs.