As the guys above have already stated:
Remove board and set it up on a box, re seat the CPU (Check for socket pin damage), Swap your RAM around (Try one stick at a time), is your Bios upto date to support the CPU? Check your Bios Battery for charge (use a multi-meter should be 3v), Reset your Bios, Check all PSU cables for pin damage.
Other than that, I'm out of options.