Question about magnetic sleep sensor

Sep 16, 2014
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I have a mid 2010 unibody macbook pro that has the screen assembly from a 2008 unibody *regular* macbook. Was wondering if someone could explain to me how the sensor mechanism works and whether the two are known to be incompatible (due to magnet position or otherwise...)? I ran a magnet along the body where the sensor is supposed to be and nothing - didn't go to sleep. I hear that that probably means the sensor is bad, but I am not certain because I am not sure exactly how the mechanism works overall. I see that there is a magnet in the body resting underneath (or above, depending on how you look at it) the battery area. But I don't know what it does when the two magnets meet when the lid closes. Any info helps. Thanks!
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