My laptop sometimes does not have a display,sometimes display is distorted?

Laptops usualy have a button to export your display. You can click it by holding in the "fn" button that's located left from the windows button(usualy). When holding it you should look for a button with 2 squares (like a tv) thats normaly the F10 button. If you click it your screen goes black or comes back. Also check your driver, check if its updated(what windows do you have?)
When does the screen disappear? Is it when you start a program or just now and then? You can run programs or games in xp mode or you can adjust their screen settings because they might not be compatible with your driver/version of windows/...