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Couple of days ago I replaced my laptop adapter, and when I use that, some amount of current discharges through the sockets,ports...etc (i.e. audio out). So I checked the adapter with a Test Pen (I don't have a Multimeter). When I connect to the charger outlet (-), Test Pen reads 110v.

Is this normal?


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It appears that your adapter or the socket you are plugging it in is not properly grounded. –  Ali Jan 10 '13 at 14:09
AC current is properly grounded. This happens only after adapter plugs to AC cable. –  sura2k Jan 10 '13 at 14:11
I don't know exactly a Test Pen is worth for testing a DC current. –  sura2k Jan 10 '13 at 14:15

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