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Undefinible noise on the top left corner

Hello,

first of all, my english is not very good, I sorry for that.

My MacBook Air 13" Mid 2012 makes undefinible noises on the top left corner. It seems like every 3 seconds a few tickles (knocks) appearing. In every situation, with/without power supply, with/without playing sounds, with/without active fans.

Does anyone know the reason for my problem?

Greetings Christian

Answered! View the answer I have this problem too

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I got a "solution". I knocked at that spot. After that the fan goes on and the problem is solved. I think the fan was blocked.

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Hello, i have the same problem, How did you get fan working?

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I'd open it up and find out just what in the fan was blocking it. It may be a screw that could short out your logic board: MacBook Air 13" Mid 2012 Fan Replacement

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Christian Knott will be eternally grateful.
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