My HP Pavilion Desktop gives a little shock (funny-bone tickling sensation) when touched especially if one is bare feet (without rubber shoes or slippers). The shock is not so shocking as of 220V AC but still, make its presence felt. So I thought of eliminating the cause as my budding kid may touch it inquisitively.
Deciding to Starting with the SMPS, I opened this branded SMPS & here is what I noticed, which I didn’t understand but could be a cause of the problem :
The three pin socket (obviously for phase, neutral and earth) for 220 AC-IN, had a strange connection. The Earth pin which is wired to the SMPS’s metallic case is also connected to the other two pins (phase & neutral) via two separate ceramic looking, blue colored capacitors marked CS 417 K.
1) Why would that do that ? Obviously the experts know better ....
2) Could it be possible that the two Caps are misbehaving and are not doing what they are supposed to do and started discharging some current to the earth. ?
3) Can I safely discontent the two Caps from Earth ?
4) I well understand that, this problem could not have arisen if had a proper earthing in my house wiring. But the wiring is a bit old being in a remote area with no separate third wire coming to take that shocking cause back under the ground.
5) Or may be, I can make a simple earthing for my PC by drilling a nail in the cemented wall nearby and connect the third earthing wire to it.
6) Lastly, I also noticed that the simple householder pen type tester used to check phase and
neutral also glows brightly when touched to the SMPS, clearing indicating that something fishy is going on inside.
What option do I have now ?
Whatever the solution you suggest .......
Thanks.