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Modifications apportées à l’MacBook Air 13" Mid 2012: loose or rattling trackpad repairintroduction

Modifié par Marc Malkwitz

Modification approuvée par Marc Malkwitz

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Introduction
[ ]In some MacBook Air and presumably many other MacBooks with similar trackpads, these tend to become loose or rattle. It is a often read mistake, that this can be adjusted or "repaired" by the central adjustment screw of the trackpad, which will only make it worse. The reason for the loose trackpad however can be found in the failure of two tiny buffers, that work as upper stop of the trackpad. Tiny as they are, no one seems to know them and unsurprisingly they fail after thousands or even millions of workcycles. In rest position, they press the trackpad against the contact point of the mentioned adjustment screw and the click button. When you click, they decompress and when you release, they are recompressed by the bounce of the click button, which explains why their elastic force must be rather small.

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