How to problem solve pc display

[rameh]

my computer is working but screen is not comening ,smps harddisc ram is proper working .

 

[ksiemb]

my computer is working but screen is not comening ,smps harddisc ram is proper working .

Was there a recent Windows update ? - Roll back the video driver in device manager.

 

[xunicronx]

Have you tried looking at the cables to see if they are hooked up properly? Could also be a video card issue, too. Can you try a different monitor?