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Title says almost all of it, and no, it's not that my display sleeps after inactivity. It was 5 seconds after touching the keyboard, last time. It's done it twice so far.

Other thing is that when you hit some keys on the keyboard for a few seconds, and it turns back on, you hear a slight bzzt sound. Very slight.

Should I be worried?

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Have you taken it into the Apple Store to get it checked out? – sudo rm -rf Mar 24 '12 at 18:24

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