Did my new PSU fry my MOBO?

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sorithin

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Sep 18, 2017
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Hi all! About a month ago, I bought a bunch of new parts for my computer (MOBO, RAM, processor) and it was running great, albeit the cord for the case fans burned so they didn't work. Over the weekend, I wanted to change the PSU (so the case fans would work and wanted to up the wattage) and switch cases. Now it won't turn on. When I press the power button, the graphics card fans will turn on for a split second and turn back off. I checked the PSU, and it's not a dud, so I've ruled that out. I even went to the store and swapped it out for a new one, which also doesn't fix the problem. I've tried unplugging and re-plugging everything in about 4 times, so everything is in tightly. I have a Gigabyte Z270N-WIFI board and the PSU is an EVGA 600B. My old PSU was a Raidmax Hybrid 530W. Any ideas what could be causing this? I've tried resetting the CMOS on the motherboard and tried breadboarding it.. neither works. Do you think the MOBO is faulty and I should replace it or could it be something else?

SPECS:
Case - NZXT 2340 Mid Tower (brand new)
MOBO - Gigabyte Z270N MATX (brand new)
CPU - Intel i5 7600K (brand new)
PSU - EVGA 600B (brand new - tested to work)
GPU - GTX 760 Twin Frozr
RAM - Corsair DDR4 4GB x2 (brand new)
HDD - Samsung 128gb SSD

Thanks!
 
Solution
S
Unless fans were somehow really defective and drawing way more current than they should, this is likely a gigabyte problem. Considering this is a new board, you can rma and get it replaced and should, while you're still within warranty. Fan header blowing from just one regular case fan is an issue with the quality of the mobo and you don't know what else might be affected and burn out in the future even if you got it working.
The PSU you have is not greatest (http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html) but considering it's brand new I'd be surprised if it crapped out that quickly.
So my advice is contact gigabyte, explain about the burn and subsequent lack of function, and request rma, whether this turns out to be...
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cin19

cin19

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Mar 14, 2011
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MERGED QUESTION
Question from sorithin : "New computer not turning on"



 
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Calvin7

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Feb 19, 2013
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Any ideas what could be causing this?

"the cord for the case fans burned"

If the case fans were connected to the motherboard fan header, the motherboard could be damaged. It seems you had some sort of short circuit. Hard to tell what was damaged or why the cord burned from your description.
 
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sorithin

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Sep 18, 2017
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510


I'm really not sure why it burned. Replaced the board, RAM and processor last month, plugged it in, turned it on and it started smoking. The cord just burned. So unplugged the fans, kept the case open and faced a regular fan at it and it worked fine. So the board was still working for the past month since the fan cord burned.
 
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sorithin

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Sep 18, 2017
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510


They were just the regular case fans on my NZXT Phantom 410. So the cord going to the built-in case fans burned. Those were the only 2 I was using, no extras.
 
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Sedivy

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Dec 17, 2016
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Unless fans were somehow really defective and drawing way more current than they should, this is likely a gigabyte problem. Considering this is a new board, you can rma and get it replaced and should, while you're still within warranty. Fan header blowing from just one regular case fan is an issue with the quality of the mobo and you don't know what else might be affected and burn out in the future even if you got it working.
The PSU you have is not greatest (http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html) but considering it's brand new I'd be surprised if it crapped out that quickly.
So my advice is contact gigabyte, explain about the burn and subsequent lack of function, and request rma, whether this turns out to be the only issue or not.
 
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