Blank screen

[dwalt]

My 10.2 was working fine. I left the room and when I came back the screen was black. I've tried several things, but no help. I've had no indication of any problems.

 

[Spawn_Dooley]

Did you shut the mac down?

 

[Siddiq Hussain]

I ve same problem. I shutdown this. Bt when I try again & again bt nothing helpful. When I disconnect my power cable it doesn't turn on.