Are motherboard sensors particularly sensitive to ESD discharge (iMac)?

By rodion15
Dec 22, 2015
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  1. I've had a couple of imacs in which, after taking the logic board out then put it together again I got a sensor failure, the sensor itself wasn't damaged (the sensors themselves are located elsewhere inside the computer), it's the sensor reading circuit, which is located in the motherboard, that is getting damaged (I replaced the sensor itself and the problem continued), so I had to replace the motherboard: in the first iMac: the ambient temperature sensor wasn't detected (that's what the apple AST-MRI test diagnosed), in the second imac the CPU fan speed sensor wasn't reading either. The only explanation I can think of is an static discharge, we didn't have proper anti-ESD mats (only poorly grounded table mats) and we have fitted carpets which create a lot of static as far as I know.
    I wonder if motherboard sensors reading circuits are particularly sensitive to static.
    Last edited: Dec 22, 2015

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