No Picture on my Monitor Please Help.

There is no picture on my monitor. Just completely black. Everything is properly connected and everything is turned on and the screen is still black no picture. The dvi cable is not the problem it had to be the monitor acting up or my computer acting up. I locked my computer when I left my room and I turned off my monitor. When I came back to go on my computer I turned on the monitor and there was no picture just black. I moved the mouse to wake the monitor up or the computer up. Nothing worked still black screen. This is unbelievable Maybe Windows 7 is acting up and it's a bug that caused this weird issue. Windows 7 could be the culprit or my computer. I had to turn off my computer completely because the black screen was still there and when I turned my computer back on the monitor was working again I saw a picture. I saw the windows 7 login screen password. Somebody please tell me how and why this happened?

Is it working OK now and did this only happen one time?

passion4tech said:

bigmck said:

Is it working OK now and did this only happen one time?

It is working ok now bigmck. Yes this has only happened once.

It would be hard to say what happened. Just hope it doesn't happen again.