sometimes, when i move myfingers over the metal part of my laptop, both the unibody and the one before, i feel some ‘stick-slip’. it is gone when i unplug the power. clearly, some voltage comes through.
The power supply has electrolytic condensers. they age: the electrolyte evaporates, or the leads corrode. you can solder them out and replace them. mine died after 6 years because the 39uF 400volt, the long ones kicked the bucket. i replaced them for 5euro each and my unit is back online
