New computer just Built, not turning on.

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Xeciaris

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Dec 13, 2015
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Hi, new to the forum. Just built this computer and it won't turn on when I press the power on the case and the motherboard. I hear a click sound when I press the power and then it just doesn't turn on.

I did the paperclip test and the psu works fine because the psu fan works. Took off the motherboard off and the standoffs were infact intact since NXZT S340 has them pre-installed.
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Here are the specs,


PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor ($249.99)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($19.89 @ OutletPC)
Motherboard: ASRock Z97 EXTREME4 ATX LGA1150 Motherboard ($87.98 @ Newegg)
Memory: Kingston HyperX Fury Blue 8GB (1 x 8GB) DDR3-1866 Memory ($29.99)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($77.88 @ OutletPC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.98 @ OutletPC)
Video Card: MSI Radeon R9 390 8GB Video Card ($319.98 @ SuperBiiz)
Case: NZXT S340 (Black) ATX Mid Tower Case ($59.99 @ Micro Center)
Power Supply: Cooler Master VSM 650W 80+ Gold Certified Semi-Modular ATX Power Supply ($69.99 @ Newegg)
Total: $965.67
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-12-13 01:51 EST-0500

I did the paperclip test and the psu works fine. Took off the motherboard and the standoffs were infact intact since NXZT S340 has them preinstalled.
 
Solution
The_Tester

ahh gotcha, yeah try not to do that sort of stuff lol. The fan headers are getting power from the ATX connector (via the motherboard). It looks like you may have inadvertently hooked the [strike]5VDC[/strike] 12VDC rail to the motherboard header if i'm looking at this right.

What may have happened was the motherboard and or PSU was self protecting to some effect. I've seen similar problems when a fan header is overloaded (like 4 big fans on one header)...
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Xeciaris

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Dec 13, 2015
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Okay, I just tried to take everything apart. I took only the motherboard and connected the gpu, psu and cpu together. It worked. Once I put everything back and did similar setup it didn't work again.
 
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The_Tester

The_Tester

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Nov 22, 2014
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So originally nothing happened right? (not even an led or fan)

Is there a DVD/CD player in the mix? On a fresh build it's best to use the integrated graphics only (if optional) with only minimum required items (CPU, RAM, SSD/HDD for OS). Can you enter the UEFI (keep tapping F2 at power on) at any point to check storage and boot settings?
 
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Shaun o

Shaun o

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Oct 7, 2007
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Hang on, let`s go through this just to confirm.
You built the whole system, connected all of the required power from the 650W power supply to the motherboard.
Placed all of the ram sticks in the memory slots of the motherboard.
And the Pci-e R9 390 8Gb graphics card in the Pci-e slot of the motherboard along with the required 12v Pci-e power connectors direct from the PSU to the card. And it did not power up inside the case.

You then removed it from the case.
Connected everything, but did not slot or plug in any ram modules.

1.It suggests you do, or may in fact have a short on the back of your motherboard.

2.That you are placing the memory modules in the wrong set of memory slots of the motherboard, depending on how many memory modules you have some motherboards stipulate what sequence of memory slots must be used, in order for the motherboard to be able to boot properly, so check that in the manual provided for your motherboard.

What was the one thing that differed with the board out side of the case to it being inside it, think hard ?.

And double check the positions of the standoffs on the motherboard mounting plate of your case.

It`s something relay stupid such as an extra standoff missed, or positioning of the ram modules in each of the four memory slots.

Remember the motherboard is going to flex slightly when on standoffs also.
So memory modules that seem flush can sometimes not be.

Make sure you apply equal pressure to each end of the ram sticks with your thumbs. and to Finnish off apply pressure to the dead center of each memory stick also making sure one is done at a time and is locked by the side tabs before fitting the next module.

I have a feeling it is down to what memory slot the memory module is fitted into on the board.




 
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The_Tester

The_Tester

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Nov 22, 2014
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:heink: can you elaborate on this? Does the fan you're using have more than one connector coming from it?

 
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Xeciaris

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Dec 13, 2015
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4,510


The NZXT S340 has two case fans. Now, these fans are both connected to this thing http://imgur.com/LB91q8R. What I did I used this cable http://imgur.com/xsRvWYh to connect it to both the motherboard and the psu. simply disconnecting it to the motherboard somehow fixed the problem.

 
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The_Tester

The_Tester

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Nov 22, 2014
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ahh gotcha, yeah try not to do that sort of stuff lol. The fan headers are getting power from the ATX connector (via the motherboard). It looks like you may have inadvertently hooked the [strike]5VDC[/strike] 12VDC rail to the motherboard header if i'm looking at this right.

What may have happened was the motherboard and or PSU was self protecting to some effect. I've seen similar problems when a fan header is overloaded (like 4 big fans on one header). Additionally I would check to see if that header is still working via a DMM (if possible set the fans speed in the UEFI to some amount so it then "should" have a voltage on it.) I would not think that something has been damaged since the there was not a reversal of biasing (like putting a AA battery in backwards) but won't hurt to check.

Well provided there are no other hidden issues it's seems you have answered your own question.
 
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