LG Flatron L1717S goes blank [Closed]

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Hello,

I have the LG Flatron L1717S, when i power it on it just comes on and display the logo and the windows page when the computer is already on and goes dark completely,i can see anything, but the amber light is still showing that the monitor is on but still remains dark. At times i will power it on an off while readjusting the screen resolution using the button, sometimes it will comes on and display without going dark, but when it goes to sleep for a long time the problem will start again when you try to wake it up, just show the flash light an goes dark again.
Any solution to this problem will rely help.