So I just got home, turned on computer. Saw it boot up, and laid down in bed for minute. Got out of bed and my screen was black...i thought it was asleep ...i touched my mouse, then my tablet, then teh keys...nothing happened. i turned it off manulally...turned it on...still black. Im freaking...I NEED to see whats up. Its a g4 imac ( the lamp/sunflower model ) Anything I can hold down during start up to fix things...if teh screen is dead ( how coudl that happen !? ) how much will it cost to fix ?! Im a designer and i cant imagien not having things up and running... PLEASE help if u can !