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Lights on mobo but pc won't turn on. Help ASAP please!!!

post #1 of 8
Thread Starter 
Okay so a friend and I are in the process of building a pc for him. He has never built one but I have built a few. We are running into to some errors that I have never encountered.

Edit: So we used his 3 year old psu out of this alienware that is a 750w alienware branded psu. It turned on fine with this psu. So its obvious something is going on with the 1000w roswell. Anything we can do to try and fix it other than call it a night?

First of all let me give you the basics of what we are working with...

intel i7 2600k 3.4ghz
Mobo - Asus P8Z68 Deluxe
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131791
Ram - Corsair 16gb ddr3 1600
Psu - Roswell Lightning 1000w
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182239

So the motherboard is all plugged up. We see that the reset and power lights on the actual mobo are lit up. Not to mention as soon as we stick one of the asus dc2 570s in a pcie slot the orange leds light up on the board. We plug up the external pci power slots and those orange lights turn to green.

The strange thing here is the fact that nothing is on yet. Not sure if these lights need to be on when the pc is off. Anyways we go to turn on the power to test it via the button on the mobo and we hear a distinct yet light click from somewhere. Think it might come from the psu but either way nothing happens. After we get it to click for the first time we can't get it to do it again unless we unplug the psu from the power source.

So what exactly is going on here? I don't think anything was installed wrong but I guess I can't rule that out quite yet. Never had anything be DOA so no idea what to look for to check that.

It would be a shame if something was DOA since he paid for overnight shipping from newegg since after tomorrow I head out of town for school.

Edit: So we used his 3 year old psu out of this alienware that is a 750w alienware branded psu. It turned on fine with this psu. So its obvious something is going on with the 1000w roswell. Anything we can do to try and fix it other than call it a night?
Edited by Outlawed - 12/28/11 at 6:51pm
Green Beast
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Green Beast
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post #2 of 8
Make sure the Video card is fully seated and the PCI-E power connectors are plugged in. Make sure your 8 pin 12v connector is plugged into the motherboard. Make sure your heatsink fan is plugged into the motherboard. Ensure that your ram is fully seated. Make sure the heatsink isnt loose. Make sure the 24 pin connector to the motherboard is fully inserted.

That should be it.

If your sure all of that is good, check your power supply connectors for unseated pins. Look at the face of the connector, if any of the pins are not flush to the end of the connector, they are unseated. Simply push the wire from the back towards the front to insert the pin fully in to the housing.

If none of this fixes the issue, you may have a bad motherboard, or PSU.
post #3 of 8
Thread Starter 
Thanks for the speedy response.

I actually just posted up an update.

While we haven't worried about any monitor interaction, We unplugged the 24 pin and the 8pin and used a 3-4 year old psu out of his old computer. It is a alienware 750w psu. We plugged up the 24 pin and 8 pin on that and it instantly came on.
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Green Beast
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post #4 of 8
Quote:
Originally Posted by Outlawed View Post

Thanks for the speedy response.
I actually just posted up an update.
While we haven't worried about any monitor interaction, We unplugged the 24 pin and the 8pin and used a 3-4 year old psu out of his old computer. It is a alienware 750w psu. We plugged up the 24 pin and 8 pin on that and it instantly came on.

Ok, take a look at the connectors, more specifically the 8 pin 12v, and the 24 pin connectors, and look for unseated pins as I suggested.
post #5 of 8
You can do a basic test on the PSU that will show you whether it's working or not. But even if it passes this test, it might have a problem when a bigger load is introduced. Here is how to test it: http://www.youtube.com/watch?v=5FWXgQSokF4
post #6 of 8
Thread Starter 
Yea I checked the connectors as soon as you mentioned. Everything looked okay.

As for the psu test I am going to try that now. Thanks!
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Green Beast
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post #7 of 8
Thread Starter 
So that test worked. The psu fan and lights actually powered on. So I guess it just need a low load of power to start as the guy in the video was saying?

So back to pulling out the 750w alienware we just installed to test it again.

Edit IT'S ALIVE!!! So having one of the small case fans connected via mollex let the system power on. Good news indeed since we had both pretty much accepted the fact that he wouldn't have his pc up and running for a few days. Weird how the other psu booted it fine without the fan.

Anyways we are installing 2 of the asus dc2 570s in sli and plan on OC them to around 580 speeds. Gonna see how his new 3d monitor treats us with BF3. Stoked to see what it looks like.

Thanks again guys!
Edited by Outlawed - 12/28/11 at 7:37pm
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Green Beast
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post #8 of 8
Quote:
Originally Posted by Outlawed View Post

So that test worked. The psu fan and lights actually powered on. So I guess it just need a low load of power to start as the guy in the video was saying?
So back to pulling out the 750w alienware we just installed to test it again.
Edit IT'S ALIVE!!! So having one of the small case fans connected via mollex let the system power on. Good news indeed since we had both pretty much accepted the fact that he wouldn't have his pc up and running for a few days. Weird how the other psu booted it fine without the fan.
Anyways we are installing 2 of the asus dc2 570s in sli and plan on OC them to around 580 speeds. Gonna see how his new 3d monitor treats us with BF3. Stoked to see what it looks like.
Thanks again guys!

Nice, good luck with the setup, enjoy!
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