System stoped working

[ujasmediaforu]

My system shutdown suddenly without going in windows. Some times power switch led have no light.and the processor fan stop suddenly..anyone tell me what is the problem with my system..or the motherboard ...

 

[sizzling]

Please list full pc spec.

 

[MicroT]

Is there anything displayed on the monitor?

If not please go through these steps first
http://www.tomshardware.co.uk/forum/261145-31-perform-steps-posting-post-boot-video-problems

If yes then what is displayed?