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PC failed to power on

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#1 WhiteZero


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Posted 08 April 2014 - 11:39 AM

  • PSU: SeaSonic SSR-650RM
  • Motherboard: Asus Z87-PLUS

Built this new rig in January of this year. Been running like a champ. Came home the other day from work to find my PC was off (I leave it on pretty much 24/7). Press the power button, power light blinks and goes out, blinks and goes out again, nothing. Unplugged it and plugged back in, tried different outlets, etc, no difference.


Took off the cover, mobo power light is on as normal. Pressing the power button, it looks like the fans kick on for a brief moment, only moving an inch, then stops. Case power button and mobo power button do the same thing. So I unplug all power connection except for the mobo, attempt to power on, same issue. Unplugged the 24-pin ATX power cable and plug it back in to make sure it's seated properly, same issue.


So I short the green and black wires on the 24-pin ATX power cable to jump start the PSU, and the PSU fan actually comes on! So I plug everything back in as normal, PC was powering up fine after that.


4 days later, I'm at work and I see that my PC is offline again. So I'm assuming the same thing has happened, will verify when I get home. I'm really torn on if this is the PSU or mobo. More than likely seems like the PSU to me.


EDIT: Well I got home and was indeed having the same issue. I did the jump start trick with a paperclip again, PSU comes in for a minute then goes out. Going to RMA with SeaSonic.

Edited by WhiteZero, 08 April 2014 - 04:07 PM.

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#2 dc3


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Posted 10 April 2014 - 03:06 PM

The motherboard initiates the startup of the PSU, when you press the power button it shorts that green and black wire.  This could be one of two things, 1) the power button is faulty.  You can either use a multimeter on the Ohm scale to see if the switch is making contact when it is pressed, or 2) you can disconnect the to leads on the front panel header and use a small screw driver to short the tow pins, if the PSU doesn't start the motherboard is bad.


That is one problem, but I don't think this is related to the computer shutting down.


After the computer has been on for several hours download and run a Speccy snapshot.


Please download and install Speccy to provide us with information about your computer.  When  FileHippo opens, click on Download latest version in the upper right pane.
When Speccy opens you will see a screen similar to the one below.
Click on File which is outlined in red in the screen above, and then click on Publish Snapshot.
The following screen will appear, click on Yes.
The following screen will appear, click on Copy to Clipboard.
In your next post right click inside the Reply to Topic box, then click on Paste.  This will load a link to the Speccy log.

Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.





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