PC Won't power on, Green Motherboard LED Blinking

I ordered all my parts for my build a few months ago. It was my first build, and I haven't been able to get around to building it until the last month or so. When I first got it, before putting the motherboard in the case, I tried to post it outside of the case, however I couldn't get all the parts going and all the fans spinning. I was only going off of youtube tutorials to build the thing at that point, and all I was doing was taking a screwdriver and tapping it against the power switch/wire, to get it to start. I must have messed something up, because after several tries, when I tapped the screwdriver to the power, there was a spark somewhere in the middle of the motherboard, and there was a burning smell. I quickly turned the psu off, but after that I wasn't able to get anything running at all anymore. The green LED power light that was a constant light before that point, was blinking.

A week or so later, I exchanged the motherboard for a new one. I tried that one, but had the same problem. Nothing powered on, and the green LED was still flashing. I read a bunch of things from the internet, and came to the assumption that it was a problem with my PSU. So I exchanged that one, and tried everything again. But yet again, the same thing happened, nothing powered on and the led still blinked.

I took the stick of RAM out and tried it with just the CPU, but the green LED still blinked. I suppose it must be a problem with my CPU, but I'm really not sure how to test it or how to know. I would appreciate any help at this point. I'm not very technical, and can honestly say I have no idea what I'm doing. Thanks in advance, and if you need any more info, don't hesitate to ask!

The Parts:

CPU - Intel Core i5-4670 Haswell 3.4GHz LGA 1150 84W
RAM - Crucial Ballistix Sport 8GB 240-Pin DDR3 SDRAM DDR3 1600
MoBo- Asus Z87-A DDR3 1600 LGA 1150
GPU - SAPPHIRE 100352-3L Radeon HD 7950 3GB 384-bit GDDR5 PCI Express 3.0 x16
PSU- Corsair Builder Series CX 500 Watt ATX/EPS 80 PLUS (CX500)
Case (If it matters) - NZXT Phantom 410
HDD - WD Blue 1 TB Desktop Hard Drive: 3.5 Inch, 7200 RPM, SATA 6 Gb/s
5 answers Last reply
More about power green motherboard led blinking
  1. did you use the power supply before or is it brand new
  2. Everything is brand new. There were two power supplies used, neither fixed the problem. I don't think it is the PSU though.
  3. you may need to return the cpu and try to see if the fixes it
  4. I was worried I'd have to do that. Is there no way to test if the cpu is the culprit first?
  5. you would need someone who has a build that can support 1150 socket to try it and make sure you know there build is working
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