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New PC - Not Turning On; Mobo Lights On; Fan Not On

Last response: in Systems
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September 4, 2011 3:34:26 PM

I just built my first PC yesterday... And it still hasn't turned on.
The thing is, the power (red) and reset (green) lights on the mobo turn on when I turn the power on on the PSU. However, when I try to turn on the actual computer, and press the button on the front of the case, nothing happens!
The fan on my PSU is not turning on, although it is obviously still providing the mobo with power. Does this mean my PSU is broken?
I am fairly certain I have all the power switches and such in the correct place; I triple checked!

Thanks!

(Intel Core i7-2600K Sandy Bridge 3.4GHz
ASUS P8z68-v Pro mobo)
September 4, 2011 4:26:33 PM

Did you plug in the 8pin cpu power and the 24pin mobo power?
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September 4, 2011 4:39:30 PM

Thanks for the quick reply!

Yes, they are plugged in. In fact, as a test, I unplugged them, and tried turning on the PSU, and the power (red) and reset (green) lights did not turn on.
This means the mobo is working, correct?


I went meticulously through the mobo manual, making sure that all of the components were connected in the correct places to both the PSU and the mobo.
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September 4, 2011 4:54:41 PM

Update:

I have been trying various combinations of things to eliminate variables.
Most salient was that I actually got one of the case's fans and the heat sink to both move for a fraction of a second. I'm not 100% what it was exactly that I did that did this. I tried the four possible different combinations of the on and off positions of the EPU and TPU switches, and it seems that this may have been why. However, I am more leaning toward the fact that these fans seemed to have briefly flickered on when I turned off the PSU, unplugged the IEC, plugged it back in, and turned the PSU on once more. I also tried using a different IEC cable, and when I turned on the PSU, I believe one of the case fans moved by a very small amount.
Still, however, the PSU's fans has never moved. Doesn't this mean that the PSU is dead? When I turn on the PSU, shouldn't the fan turn on, regardless of the mobo and the other parts?


Thanks!
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September 4, 2011 5:20:34 PM

Here are my specs, if it helps:

- mobo

ASUS P8Z68-V Pro

- CPU

Intel i7-2600K, 3.40 GHz, 8MB cache, LGA1155

- GPU

NVidia Quadro FX4600

- PSU

750 W PC Power & Cooling Silencer Mk II

- RAM

G.Skill F3-12800CL9T (4 x 4 GB (I tried turning it on with just one stick in, and with all four sticks in))
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September 4, 2011 6:18:13 PM

troubleshooting 101 -
unplug everything you dont need on to make it post.
unplug the hard drive, unplug dvd burner, unplug misc cards in slot, unplug misc case fans, unplug the video card (only if you have onboard video), make sure to only have 1 stick of ram in (try it in different slots). unplug all the front panel connections and only have the power switch connected (if it doesnt work one way, turn it around on the pins and try it)
make sure your PSU is set to 115 or 220, whatever your region. make sure your psu power connectors are snug on the mobo. if after this it doesnt turn on, double check to see if your cpu is seated properly.
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September 4, 2011 6:35:15 PM

Had exactly same problem, my build:
Intel 2600K,
Asus P8P67 Pro
XFX 750W BE

Had inclusively the fans moving for a fraction of second.
Try to turn on your PSU without the mobo (search for "how to turn on psu without mobo" in google)
If it works, time to RMA your mobo

Used my mobo for a full month and them the mobo died.
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September 4, 2011 6:45:25 PM

are u sure u got all the front panel connectors connected on the mobo correctly ?
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September 5, 2011 1:46:41 PM

cerebrate42 said:
Update:

I have been trying various combinations of things to eliminate variables.
Most salient was that I actually got one of the case's fans and the heat sink to both move for a fraction of a second. I'm not 100% what it was exactly that I did that did this. I tried the four possible different combinations of the on and off positions of the EPU and TPU switches, and it seems that this may have been why. However, I am more leaning toward the fact that these fans seemed to have briefly flickered on when I turned off the PSU, unplugged the IEC, plugged it back in, and turned the PSU on once more. I also tried using a different IEC cable, and when I turned on the PSU, I believe one of the case fans moved by a very small amount.
Still, however, the PSU's fans has never moved. Doesn't this mean that the PSU is dead? When I turn on the PSU, shouldn't the fan turn on, regardless of the mobo and the other parts?


Thanks!


If you have the psu plugged into the wall, then you unplug it. The fans will still jump when you press the case power button even with the psu unplugged. This is left over power in the capacitors and your supposed to do this a couple times before you open the computer and start removing/replacing components.
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September 5, 2011 1:47:17 PM

cerebrate42 said:
Update:

I have been trying various combinations of things to eliminate variables.
Most salient was that I actually got one of the case's fans and the heat sink to both move for a fraction of a second. I'm not 100% what it was exactly that I did that did this. I tried the four possible different combinations of the on and off positions of the EPU and TPU switches, and it seems that this may have been why. However, I am more leaning toward the fact that these fans seemed to have briefly flickered on when I turned off the PSU, unplugged the IEC, plugged it back in, and turned the PSU on once more. I also tried using a different IEC cable, and when I turned on the PSU, I believe one of the case fans moved by a very small amount.
Still, however, the PSU's fans has never moved. Doesn't this mean that the PSU is dead? When I turn on the PSU, shouldn't the fan turn on, regardless of the mobo and the other parts?


Thanks!


If you have the psu plugged into the wall, and then you unplug it, the fans will still jump when you press the case power button even with the psu unplugged. This is left over power in the capacitors and your supposed to do this a couple times before you open the computer and start removing/replacing components.
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September 6, 2011 2:20:25 PM

Hey there,

Thanks for the help everyone!!
I tried several of these approaches.
Most importantly, I took everything except the mobo and the PSU out, and started testing each part one-at-a-time from there... And I got it to WORK!!! :) 

Thank you so much for your help everyone!
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September 7, 2011 5:33:45 AM

yup, Im glad you learned from my troubleshooting 101 course :) 
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!