Screen making buzzing sound

I purchased my MacBook in August of 2007. Lately the only problem i have been having is that the screen is starting to make a buzzing sound. Thing is if you scroll down/up the buzzing goes away. But you're reading an article or writing up a document or just letting the screen saver start, it buzzes. It's driving me nuts. Please help.

Mine does it too. You can download software called Magic Noise Killer that will eliminate the buzz. From what I understand the issue has to do with power management when the CPU is idle. This program gives it something to do so it won't buzz anymore. I don't know how safe it is or whether the buzz will lead to a eventual failure though.

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