About my computer screen?

Technical issue: Screen of HP computer going black?

• This happens at desultory - random - times and I can't identify the cause. I have an HP computer, and in the middle of the physical monitor, below the computer screen, there is a little light that is green when the computer is on and the screen is displaying; the light is orange when the computer is on but asleep and the light is completely off when the computer is powered down. Sometimes I'll be using the computer - often it is idle for a few moments - and then without warning the light turns off and the screen goes black. However, the light on the PC - which is the button that I press to turn on the computer - is still blue, indicating that the computer is still on. At this point I fiddle by wildly pressing keys on the keyboard, moving the mouse, pressing the on/off button, pressing a button in the corner of the keyboard with the logo of a crescent moon, and pressing the green/orange light below the screen. If I'm lucky the screen will turn back on - but I can't find any rhyme or reason to it. Please help.

• Answer:

  look in your advanced power setting , hibernation sleep etc