Building Computer (Problem)

Cjh1922

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Sep 24, 2015
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I'm currently building a computer and I'm running into a problem. I have every thing hooked in correctly, but when I turn it on it only runs for 2 seconds before shutting down. It'll continue to do this.

Spes:
Gigabyte z97x gaming 3 motherboard
I7 4790k processor
GTX 980 graphics card
Samsung SSD
2 x 8Gb Corsair Vengeance Ram
CX 850M power supply
Corsair 400r case

I won't get any display at all. Any help will do. I tried unplugging everything and replugging them back up. I tried taking the power supply out of the case to check for back grounding, but same problem still occurs. What's strange is this motherboard does not have the 4 pin CPU power connector. It only has the 24 pin ATX and a 2x4 ATX 12v connection. Would that be a problem? Any suggestions?

Update:
I just brought it down to the mb, one ram stick, and the power supply. The mb is on a cardboard box tray of the case and the power supply is outside the case. Still same result. Starts up for 2 seconds, and then shuts off.
 
Solution
try with the gpu pulled see if it a bios bug. if there no power...check that the io shield not shorted into the ethernet or usb ports. make sure the mb sitting on copper mb standoffs and is not shorting to the mb tray. if the standoff were used then pull the mb from the case..with just one ram stick and power see if the mb will post on top of the mb box. this rule out a fan or a case short.

Stingerxxx

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Nov 22, 2014
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The 4-pin wouldn't do you any good - there's no place to put a 3rd pin on mobo's. The 8-pin replaces your 4-pin for the GPU. That mobo should fit the power reqs of the 4790 off the 24 pin - I believe it hits around 125v or something, which the 4790 shouldn't break that. I don't think o_O
 

Stingerxxx

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Nov 22, 2014
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Simply to eliminate a problem - take a jumper off a CD rom drive, or as a last resort your SSD if it has one. Unplug the power cable from the mobo and slip the jumper over the two pins that cable attached to - but immediately pull off, simulating pushing a power switch. This will make sure it's not the power button on the case. Not a likely problem, but starting with the easiest to troubleshoot and the first to pop into my mind due to a recent issue with that. I'll edit this post if more things come to mind
 

BlackPseudicide

Honorable
Feb 5, 2013
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10,860
If you don't have the 8pin cpu connector plugged in then that is definitely a problem. Make sure you reference your power supply manual and make sure that the 8pin connector (which might be two 4pin connectors that click together) is put into the correct slot on your power supply and going to the 8pin slot on your motherboard.
http://oi59.tinypic.com/2rffoxy.jpg

If the problem persists after checking that, make sure all the rest of your cables are plugged in correctly, then you might want to re-seat your cpu or reset the CMOS battery on your motherboard.
 

Stingerxxx

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Nov 22, 2014
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BlackPseudicide, he said "It only has the 24 pin ATX and a 2x4 ATX 12v connection." He has all the power plugs the motherboard requires, and he said he plugged them in. Unplugged them and plugged them in again even.
 
try with the gpu pulled see if it a bios bug. if there no power...check that the io shield not shorted into the ethernet or usb ports. make sure the mb sitting on copper mb standoffs and is not shorting to the mb tray. if the standoff were used then pull the mb from the case..with just one ram stick and power see if the mb will post on top of the mb box. this rule out a fan or a case short.
 
Solution