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unclesben

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Feb 24, 2013
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I have a HP computer that turns on but it turns right back off. It will not even load up to the HP screen that lets you hit F1 or anything. I have taken out the ram one stick at a time and put it back in one stick at a time. What is the cause of the computer not turning on? I have never had this problem before so I am stumped on what is causing the problem.
 
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unclesben

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Feb 24, 2013
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I put in a aftermarket corsair CX 430 and that is what is happening to it now after I put it in. And it is brand new.
 
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delellod123

delellod123

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Jun 5, 2012
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Does the old one still work? see if it does. Is everything plugged in? including the CPU power supply and the 24Pin motherboard cable?

-Actually, come to think of it, I remember HP motherboards having a Proprietary plug for the case components. that includes the power button, reset, lights, and hard drive led. I remember it being a small white brick shape. Is that the case with yours? what model hp is it?
 
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delellod123

delellod123

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scratch that, sorry that makes no difference in your circumstance... I was thinking you replaced the whole case for some reason. Never mind. Still try the old one out, and/or make sure everything is plugged in correctly. Either that or return the PSU. What did you need it for? a graphics card?
 
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unclesben

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Feb 24, 2013
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HP p6720f I just tried the old power supply that I took out of the PC and it does the samething. It turns on and turns right back off. And it turns right back on but it does not go anywhere.
 
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