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Pc only turns on from switch on the back then shuts off

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ulyc Posts 1 Registration date Wednesday 14 August 2013 Status Member Last seen 14 August 2013 - 14 Aug 2013 à 14:49
xpcman Posts 19528 Registration date Wednesday 8 October 2008 Status Contributor Last seen 15 June 2019 - 15 Aug 2013 à 15:44
Recently just built a rig. Assembled it on my dining table, no problem. Finished it, and put the side panel
So I can transfer it to my desk. Plugged all the cables ( mouse, keyboard etc.) The last part was the power cable, I go and plug it into a power outlet and my PC turns on. Fans, and lights go off. After about 3 sec, PC shuts off on its own. 


I flip the power switch off on the back after all the fans and lights die out. I flip the power switch on soon after and the same thing happens, turns on...3 sec of power.....shuts off.



Rough specs:

PSU - Silencer ZIII  500 w

GFX - 660ti boost

MOBO - ASRock z77 EXTREME4

CPU - I5            
                

    

        



            

                
                
            

            

    

    
            

            

    

    
    

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                    xpcman
    
        
                    Posts
            
                
            19528
                
                            Registration date
            Wednesday  8 October 2008
                            Status
            Contributor
                            Last seen
            15 June 2019
            

            
                    1,824
    
    
                    

                    15 Aug 2013 à 15:44
                        

    


    

                        

                    I suspect either a bad PSU or MB. Is it possible to try another PSU?



You need to start your debug process by disconnecting everything but the motherboard and PSU. Then double check the power connections to the MB.

with no memory you should get a beep when you turn it on.



Then add the memory and hard drive and other devices, one at a time.



Good Luck