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Computer won't start!

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assimost
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Friday, January 01, 2016 9:42 PM (permalink)
I am using a Supernova 1000 P
When I push the power button on my computer it will not start. I have gotten around this by unplugging my computer for a period of time. Not sure how long I have to unplug it though. It has worked within 15 min and also not worked until unplugged for a much longer time. Once it starts up the computer works perfectly fine. I am wondering if this could be a possible power supply issue or not. I am also looking into it being a motherboard or bios battery problem as the motherboard is around 3 years old. It is a Sabertooth z77 and the battery is in a terribly inconvenient location under the heat/dust shield, so I haven't tried to rip my whole computer apart yet to see if that solves my problem. Any suggestions?
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    Zuhl3156
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    Re: Computer won't start! Friday, January 01, 2016 10:25 PM (permalink)
    Do you have or can you borrow a Voltmeter? Plug the leads into a Molex connector to make sure that the PSU is actually putting out 12vdc when you hit the power button.

     
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    Cool GTX
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    Re: Computer won't start! Friday, January 01, 2016 10:37 PM (permalink)
    Could be a poor connection or faulty power button / wires
     
    With voltmeter, remove wires from motherboard for start button. (Removing & reinstalling the wires can remove any built-up oxides on the connection.
     
    Connect voltmeter in continuity mode. (to the wire leads that would attach to MB)  When you push start button you should have little or no resistance; but, you have a complete circuit.  The start button is a normally open switch, you temporarily close this switch, by pushing it, this in turn grounds the start circuit.
     
    If you do not have a voltmeter and you can reach the start button, just make momentary contact across the poles where wires attach.
     
    You may also be able to switch the reset button with the start button, if it is the momentary type - or just cycle it ON then OFF if it is not momentary contact.

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    assimost
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    Re: Computer won't start! Tuesday, January 05, 2016 11:47 PM (permalink)
    Since it turns on everytime I unplug it for awhile it wouldn't make sense for the button to be an issue. I don't have a voltmeter, something I need to pick up eventually. But I have already switched the power and reset buttons to see if that was the issue and I have tried shorting the start contacts with no results. I have also dismissed it as the bios battery by leaving it unplugged for a day and seeing if the settings and date/time remained accurate, and it did and has done so on several occasions. That leaves me with thinking there could be a problem with the power supply or possible faulty capacitors or some other component in the motherboard. The motherboard is about 3.5 years old now. 
     
    I think I'll try and borrow a voltmeter or else go and get one soon and see if it is the PS. I think I am still under evga warranty so maybe I can RMA it and solve my problems. Otherwise I think its time to upgrade my core system.
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