system boots, but no any display on monitor

[Arsh25]

thanks friends Arsh25, Ravi deja & jenius-jutt for your responses. let me try with what you all said and i will come back and tell you the result. But the thing is today morning now when i start my computer, it started immediately without troubling me. That's why i said starange problem. ahhahahh

If you do not have a UPS then i suspect the issue is with low voltage itself.

 

[nskaran]

No i do not have UPS.