You may try to reseat the CMOS battery from the computer and see if it helps. For detailed information on same, you may refer to system service manual: http://bit.ly/XnP4vD
Please ensure to follow safety instructions in manual and share the findings.
Thanks and regards,
Hi. Sorry for the very late response to my post... I found a video in youtube and I think this may solve the issue... The culprit was the power button not the CPU or the motherboard.. See video below.
I was messing around with my PC trying different video adapters such as Display Port->VGA and other adapters i had to make it work. Upon swapping out my original display port to display port connection is when i had the blinking orange 3. I reverted back to my display port to display port connection and the PC powered on just fine. So there i can rightfully assume that this is a problem with your video adapter. Try switching to VGA or DVI or Display port without any adapters and hopefully you find a solution in that.