Have to press power button many times before computer turns on.  Help!

Sometimes I push the power button, and it turns on immediately. Other times, I have to fidget, and push it many times before it decides to turn on. Am afraid that repeated pressing, and fidgeting is going to make problem worse, but is the only way I can turn computer on now. Does anyone know why this is, and how to fix it?

Chris's advice sounds good. I press my 'on' button and my BlackBook JUMPS to start. Use the adapter and make sure it isn't a battery problem. If all else fails don't hesitate to call Apple or take it into an Apple store. They will happily fix it.
Tim...

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    Please click the " Thumbs up + button" if I have helped you and click "Accept as Solution" if your problem is solved.
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