PC not starting. Benched, results within

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poochiepiano

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A few days ago, my PC wouldn't turn on, pressed power button, absolutely no response. I took out all RAM except for one and unplugged the 24-pin plug from my motherboard and connected it to a 24-pin jumper for my PSU. Case then received power, with the case fans starting up. After that, I followed the guide stickied on the motherboard forum. I took everything out, just did the PSU, mobo, and CPU+cooler. Wouldn't start, no sign of any power.

With this, does it sound fairly reasonable to conclude that my motherboard is the issue? Or at least a good place to start by RMA-ing it?

I do not have a mobo speaker so unfortunately I can't get any information that way.

For reference, here's my specs: i5-4690K, Asrock z97 Extreme6, EVGA GTX 960 SSC, Samsung 850 Evo (boot disk) and a WD Blue 1TB, 8 GB G.skill Ripjaws, and Antec Nine Hundred II case.

Appreciate any feedback!
 
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bignastyid
Just because the psu shows some signs of life doesn't mean its good. It could have a dead or dying rail and still show some signs of life. Usually motherboards dont damage other parts. Its possible but unlikely. A cheap psu on the other hand is far more likely to cause damage when it fails than a motherboard.
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poochiepiano

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Not sure why I wrote 6500, I think it may be 4690K. Edited the post to reflect this. Can't remember the number, but it's worked for the past two years so definitely not skylake.
 
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poochiepiano

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Based on the results, namely that the PSU powers on the case when I use the 24-pin jumper but not when I plug it into the motherboard, I am leaning towards motherboard, though I realize that it is not quite conclusive. Pretty good bet that it is one of those two, though?

If it is the motherboard, what are the chances that the rest of the parts got messed up?
 
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bignastyid

bignastyid

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Just because the psu shows some signs of life doesn't mean its good. It could have a dead or dying rail and still show some signs of life. Usually motherboards dont damage other parts. Its possible but unlikely. A cheap psu on the other hand is far more likely to cause damage when it fails than a motherboard.
 
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poochiepiano

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Gotcha. I won't rule it out, then, but for now, the motherboard is the prime suspect unless something weird comes up when I measure the rails but the EVGA 750W B2 supposedly a pretty reliable model. Could always be one of the exceptions, I guess. Unfortunately, I don't have a spare PSU lying around to test out the system with.

Anyways, thanks for all your help, I really appreciate the input.
 
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