Why does my power adapter sparks and crackles?

I have 2 power adapters and when I plug them in they spark and crackle. I want to know why since I went out to buy a new one and had it awhile and now its doing the same thing. Is this dangerous to my computer?

Wendy,
You're not giving us a lot of information to go on. However, my guess is that you have the power adapter plugged in, and then you plug in the PowerBook. If that's the case, sparking at the DC connector is normal. If you want to eliminate the sparking, and the associated stress to your PowerBook: plug the power adapter in to your computer, and trhen plug the power adapter into the wall.

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