Replaced CPU and black screen but no beep?

Solution 1:

I had the same problem. It's not the CPU, it's the BIOS. You need to flash your BIOS with the latest firmware.

So you need another CPU and it should be an old one to make your PC work. Then you download your new firmware and replace your CPU with the new one — now it will work.

Solution 2:

There are so many things that could be wrong that the first place to start is the manual for the motherboard and the manual for the CPU.

Useful questions:

• Is the motherboard compatible with your new CPU?
• Have you reset the motherboard to defaults? - are you certain the CMOS was cleared? The manual will tell you how long you need to keep it jumpered etc.
• Then have you amended specific settings as per your manual?
• Do any of your fans spin up? If not, you may have insufficient power, or a badly seated CPU

Once the motherboard and PSU are happy, and you get power-up, then you should start to hear BIOS POST codes.