Thanks! This also worked for (my) iMac!
I use Cyclope Employee Surveillance Solution, which is a non-invasive monitoring software that provide many reports and statistics related to employees activities. Reports related to productive/unproductive applications usage, active/idle time, Internet activity, files activity, documents activity and much more. Check out the related link below to see a demo of this application.
Knowledge is something you know. Knowledge base is where you go to get the answers to things you do not know. Like a dictionary, a support link on a computer.
You should use the menu or buttons placed under or behind or in the front of your screen.
Sounds like its either your LCD or Video card. If you still have warranty send it back immediatly for a fix or a complete exchange, if not, then try to diagnose if its actually the LCD or video card, and purchase replacement part.