A buzzing when I turn my computer on?

This is the first problem I've ever experianced with my MacBook (white). I got it back in June and it has worked fine until this morning when I turned it on and it started making this obnoxious buzzing and grinding sound that won't stop until I turn the computer off. What could be wrong with it? Will I have to send it in for repairs?

The grinding sound is the part that worries me. It could be a number of things, ranging from the fan to the hard drive to a speaker. If the machine successfully boots, it probably isn't the hard drive. It could be the fan or the speaker. If the sound is coming from the top, right underneath the bezel, it is the speaker. If the sound is more centred on the keyboard, it is the fan. If it is the fan, it is absolutely critical that you get the machine serviced. The sound could be the fan dying, which could be devastating to the machine.

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Say thanks by clicking the Kudos Thumbs Up to the right in the post.
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A buzzing when I turn my computer on?

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