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The March 2015 update of Apple's 13" MacBook Pro Retina Display, model A1502, features fifth-generation Intel Core i5 and i7 processors and introduces the Force Touch trackpad.

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Knocking sound when tilted - around top of keyboard or screen area

There is a distinct knocking sound when tilting the Macbook. It feels like something is sliding and knocking the metal casing, but it's extremely had to identify exactly where. It sounds and feels like something heavy, possibly a battery, but the batteries are towards the front (and stuck down!) The knocking sound is coming from the bottom of screen area, more towards the right but across the length of the hinge.

This has baffled me and there appear to be more people with this issue - is it the fan moving on it's axial?

Is there something loose in the screen itself? - it does sound like something heavy, flat and moving side to side (it's absolutely not a loose screw or something 'rattling' around).

Is there a solid metal bar/fixing in the hinge area it could be?

Ответ на этот вопрос У меня та же проблема

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You'll need to bring it in for warranty repair that's not good for a new system!

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If the sound repeats its the fan blade hitting the fan housing as the bearing is bad. As long as you haven't banged your case this should be able to get this fixed under warranty given your systems age.

Bring your system into an Apple Store or Apple authorized service center to be looked at.

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Jaybe будет вечно благодарен.
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