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Thread Starter 
Hi folks,
Just this morning my iMac (2.5GHz i5), 500GB HD, Lion), which I've owned for over two weeks now began to make strange noise in the left part itself when I type. Strangely, it doesn't utter make the noise when I use a keyboard shortcut, but when I type at least a few words, or a sentence. It begins to make the sound immediately. It doesn't seem to be a the hard drive noise, because that can be heard when the apps are working or the computer booting, etc. I ran some HD diagnostics and everything seems to be fine.
What could this be?