My computer's power button is not starting

[Badal]

Hey friends, my pc mother board green light is working but power button light not working due to which all system is not working.
Help me to resolve this problem.

 

[Cycloid Torus]

Download and refer to motherboard manufacturer's manual. Review material at link: http://www.computerhope.com/issues/ch000607.htm Follow steps to focus on actual issue.