What version of OSX are you using? Is this opening the lid or full power up? Which model? Go to Apple :: About this Mac :: More info ... and give us the "Model Identifier". The more you tell, the more specific answer you will get.
-Ken
Take it to an Apple Genius Bar--make appointment, especially if a long drive.
Generally we will need more info on your model, too. Go to Apple :: About This Mac :: More Info.... Check the Model Identifier: and Hardware :: Power tab report the Cycle count and the Charge remaining in case it is a battery problem rather than the display.
-Ken
i am not a tech guy so i hope this makes sense. i started up my mac book and the apple appears then...
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i am not a tech guy so i hope this makes sense. i started up my mac book and the apple appears then the spinning wheel and then it goes black with the cursor in the top left hand corner. i would think this is a bad thing.