small buzzing (SSD activity) when the air is plugged

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hi im have 2011 mba 13.

want know if normal hear little hum or buzz (t sounds spinning hard disk, o shaver) every time scroll page on safari , when open app or loading (like sdd have activity) .i understand ssd not have because has no moving parts

when unplug magsafe of air disappears :confused: appear when air plugged .

small hum/buzz comes close esc key near magsafe connector

in advance
 

sounds power management bit of computer - may nothing, take local apple store if still in warranty.

david
 


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