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Model A1502 / 2.6 GHz (Turbo Boost up to 3.1 GHz) or 2.8 GHz (Turbo Boost up to 3.3 GHz) dual-core Intel Core i7 processor with 4MB shared L3 cache.

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Keyboard does not work sometimes

Sometimes my keyboard does not work. And it will be back to normal after a short while( about 1 to 3 minutes).

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crwdns2889612:0crwdne2889612:0 0
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Have you tried to reset the operating system back to the factory default? perhaps this can help.

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No, I didn't. I think it's too dangerous to reset os. Any other idea?

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Tieying Li crwdns2934231:0crwdne2934231:0
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