Cpu not startup its problem again n again

[nanak3drenderingservicesstudio]

My cpu amd quadcore proccesser , Ram Ddr4 4gd ,graffic 2gb . when i start pc then it turn on onlr 2 - 3 second only then it will turn off .. and i tried to after 10 sec ... then i fac same problem... its problem again n again ... power supply ok.. but cpu not startup ... what is problem on my cpu ... give me any solution

 

[1LiquidPC]

What are full system specs? Does the on/off cycle go on forever unless you turn it off? Is this a new PC, or has this issue just started?