This is one reason why you shouldn't double post.
I saw your other post. You said you bought the CPU from someone. You may have bought a dead CPU. Did you see the chip work in another system?
If you reinstall the original chip, does your system work?
i did not saw it working on another system because i bought it from ebay, but! when the core 2 duo is on, the display does not gives image and the computer stays on.
and when the pentium D is on, the computer works perfectly.