I just recently bought myself a new CPU, an AMD A10 7870K. I plugged it into my home-built computer, and when I turned it on all that was displayed on the screen was a "99" at the bottom right. Nothing shows up, no BIOS or anything. My first thought was that the motherboard was dead, but when I reinstalled my old CPU back into my motherboard, it worked fine, and that's how I'm creating this post.