Green Mobo power LED is on but nothing else when jpwr2 plugged in

Victoir

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Jul 20, 2015
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I recently built my first pc and I'm not tech savvy so I'll explain the best I can.
I turned on my pc with everything plugged in to test the power supply, and it worked fine until I tried to turn it off and it kept turning back on so I turned the pc off using the psu switch. After I tried to turn it back on a little while after it would not work only the green LED for the mobo was on and nothing happened when I would press the power button. I decided to try to find out the cause of it and it was the JPWR2 port that's keeping everything off (when I don't have it plugged in everything turns on for 1/2 a second) I switched every wire that was connected to the JPWR2 port and it still did the same. I am certain that my wiring is correct (according to the guide and the fact that it turned on for a while) Here are my parts:

Kingston Digital 240GB SSDNow V300 SATA 3 2.5 (7mm height) Solid State Drive -SSD

WD Blue 1TB Desktop 3.5 Inch SATA 6Gb/s 7200rpm Internal Hard Drive -HDD

EVGA GeForce GTX 970 Super Clocked ACX 2.0 4GB -Graphics card

MSI ATX DDR3 2600 LGA 1150 Motherboards Z97 GAMING 9 AC -Motherboard

Deepcool Captain 360 Water-cooled CPU Heatsink Fan Cooled Liquid-cooled Mute -Cooler

Cooler Master Cosmos II -Case

Intel Core i7-4790K Processor -Processor

G.SKILL Ripjaws X Series 16GB (2 x 8GB) -Ram

EVGA SuperNOVA 850 G2 80+ GOLD -Powersupply

I haven't gotten to downloading the software to it yet because it can't turn on -.-
How do I deal with this?
Is there a way to fix this?
Is this a common thing?
 
Solution
JPWR2 is the CPU power connector. With no power being supplied to the CPU you're not going to be able to do anything.

Try assembling and testing the motherboard and CPU outside of the computer case first.

Victoir

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Jul 20, 2015
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Update: For some reason completely unplugging the JPWR2 port caused it to work? It took a few tries (felt like CPR on the pc) but it started up, any ideas why this is?
 

Victoir

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Jul 20, 2015
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i used the eps12v cpu power connector 4+4, a new problem has risen since the JPWR2 isn't plugged in I cannot use my monitor -.- which is a big problem cause i cant install any software or get into the bios. How can i get it so that I don't need to use the JPWR2 and have the monitor? Fix the JPWR2 from stealing all the power? The instant I plug in the EPS12V connector into the JPWR2 everything crashes...
 

Victoir

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Jul 20, 2015
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I found the problem after removing the mobo, there was a connection to the cpu that fried -.- this is utterly disappointing but thanks for the help :D was about to overlook it because it was so small. Almost returned the psu