CPU change and now can't boot

I didn't flash my BIOS, this BIOS came with the motherboard.

Golden said:

Hi,

I had a bit of a quick hunt around, and found this. Does it look/sound familar? How does your thermal paste look?

[Solved] First build gone wrong: NO POST - General-Homebuilt - Homebuilt-Systems

Regards,
Golden

You mean the 8-pin connector or the paste? I put a pea sized drop, I heard it's better for the cooler to spread it. And I have a 4-pin connector connected, should I connect the other one? Or is that dangerous?

How would too much thermal compound prevent passing POST? And should I connect the other 4-pin CPU connector? (I already have 1 put in)

Thermal paste should be a rice-grain size, pea size is enough for 4 CPUs. If there is an 8-pin connector near the CPU socket, both need to be connected.

I have heard of issues of non-post because the heatsink was tightened to much and warped the motherboard.

I tried pretty much everything now. I loosened the cooler, tried it with 1 4-pin CPU connector, tried it with 2x4-pin CPU connector, and I read that my mouse can prevent boot so I disconnected that but it still won't past POST.