Boot problem

[The Shade]

Hi, 3 months ago I  built a pc and now for some reason some times it refuse post or give any indication of trying to boot and randomly starts like normal again and I don't have any idea what is happening, I sometimes unplug the 24 pin of the motherboard and reconnecting it again and it works gust fine and after I use it if I turn it off or put it in sleep mode it gust stuck again and refuse to do anything and if I tried to turn it on couple of times and/or unplug and replug the 24 pin connector it start up fine 

Please help :'(

This is my system:

http://pcpartpicker.com/p/BmpDpg

[WebPlayz]

39 minutes ago, The Shade said:

Hi, 3 months ago I  built a pc and now for some reason some times it refuse post or give any indication of trying to boot and randomly starts like normal again and I don't have any idea what is happening, I sometimes unplug the 24 pin of the motherboard and reconnecting it again and it works gust fine and after I use it if I turn it off or put it in sleep mode it gust stuck again and refuse to do anything and if I tried to turn it on couple of times and/or unplug and replug the 24 pin connector it start up fine 

Please help :'(

This is my system:

http://pcpartpicker.com/p/BmpDpg

Does it go in a boot loop?

[FAQBytes]

Before trying any of this, remove everything except the power cable and display connector (From everything, including the monitor) then try again.

If not, consult below.

 

[The Shade]

7 hours ago, Killstreak said:

Does it go in a boot loop?

No, it gust have no sign of any activity like I didn't push the power button but if I left it for a while and tried again later it will work 

[The Shade]

7 hours ago, Killstreak said:

Does it go in a boot loop?

No, it gust have no sign of any activity like I didn't push the power button but if I left it for a while and tried again later it will work 

[The Shade]

7 hours ago, FAQBytes said:

Before trying any of this, remove everything except the power cable and display connector (From everything, including the monitor) then try again.

If not, consult below.

 

Thanks, that is the most specific guidelines for troubleshooting a computer I ever saw but I don't think that this will help me because the problem is come and go and even  after a long session on it I turn it off then I tried to turn it on again and it doesn't work for no apparent reason but if I tried so hard it works and sometimes I would have to unplug the 24 pin from the motherboard and reconnecting it again and it works!!!

Why? ... I have no idea ?