Power saving mode or full power off?
The monitor is controlled by the video card or on-board video. Do you have a separate card or on-board video? If it is a card it's going bad. If it's on-board the drivers may be corrupt.
Tell us more.
I have a compaq CPU of 80GB hard disk 845 board 512RAM 2.4GHz processor. It was working very fine but few days before my monitor (LG TFT 15.4inches) started switching off & on automatically.After few minutes monitor switches off permanently. I tried by changing the monitor but, problem remains same. I found, therefore, it is not the problem of monitor. I replace the power cable but, I cant get rid of this problem.
Anyone can help me.
What to do yaar.