Upgraded processor, won't boot to BIOS.

Hello all,
I am fairly new at this so excuse any ignorance. I built this pc back in October, and it ran flawlessly until I decided to upgrade my i3 processor to an i5. As soon as I swapped them out, the PC began to run , fans + LED would come on then shut off almost instantly. At first, it would repeat over and over until I unplugged it from the socket.

I ordered a 2nd mobo, which in my haste I bent a pin or two , so I ordered a 3rd mobo yet I have the same problem. The system fans and LED come on , but instantly shut off without reaching BIOS.

Any help is appreciated and needed.

Specs:

Western Digital WD Blue WD5000AAKX 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive - OEM

ASRock Z75 Pro3 LGA 1155 Intel Z75 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

IN WIN GreenMe 650 650W ATX 12V V2.31& EPS 12V 2.92 Version SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply

ARCTIC Alpine 11 Plus CPU Cooler - Intel, Supports Multiple Sockets, 92mm PWM Fan at 23dBA

Crucial Ballistix Sport 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model BLS2KIT4G3D1609DS1S00 X 2 (16 GB total)

Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K

OLD PROCESSOR: Intel Core i3-3220 Ivy Bridge 3.3GHz LGA 1155 55W Dual-Core Desktop Processor Intel HD Graphics 2500 BX80637i33220

Rosewill ATX Challenger case.
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More about upgraded processor boot bios
  1. Could be the cpu heatsink isn't seated properly or applying too much pressure on the cpu itself. I would turn the board over after installing the i5 heatsink and see if all the pins are evenly seated.
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