There is fault in your monitor.
so it is turn negative.
go to hardware vendor and make it repair.
Hold down control-option-and command and then press 8
at the computer
OK so you see a screen and there is a keyboard in front of it that is a COMPUTER! You turn on the screen and you got on a computer!
Is your computer screen plugged in? Make sure your computer screen is properly connected to your computer.
you restart the computer then turn it on again
If your computer screen goes black, the first thing to try is to turn your computer off, and then turn it on again. This allows the computer to re-boot.
The picture you see on the screen when you turn on a computer is typically called the "boot screen" or "splash screen." It often displays the manufacturer's logo or brand name while the operating system is loading. This screen serves as an indication that the computer is starting up.
Turn it on.
Turn the computer off then turn the computer back on
The page that displays the icons when you turn your computer on is called your home screen. Some people do call it the main screen as well.
To turn any computer into a touch screen
mr yoshis game show
green color is vantage for our eyes.