Computer starts for 3-4 seconds and dies.

[nicholas_51]

Hi, when I go to start my computer it will turn on for 3-4 seconds (lights come on and fans spin) then it will die and repeat this process till I unplug it. I had this issue before but managed to fix it by unplugging and replugging the power cable from the motherboard however this hasn't worked this time. Any help would be appreciated.

 

[CountMike]

Check if start button is maybe stuck, that's exactly what happens in that case.