PC CASE GROUNDED.

[Jeybsss]

my pc case is grounded and both of my system unit and monitor are plugged in to my AVR, even though my pc is turned off i can feel electric shock  through the metal parts of my case, but when i unplugged the system unit (the psu power cable) from the avr and changed it to my natural outlet, the ground was gone. what could be the reason of the ground?

[Levent]

You can "feel ground"???? Your AVR might not be grounded as you thought. Check the plug and see if they actually have earth/ground prongs

[Jeybsss]

14 minutes ago, Levent said:

You can "feel ground"???? Your AVR might not be grounded as you thought. Check the plug and see if they actually have earth/ground prongs

sorry its electric shock, but yeah they have earth/ground prongs

[Cyracus]

JayzTwoCents had a problem like that... don't remember the details, will search for the video.

[mariushm]

The power supply on the computer intentionally leaks a bit of energy into the grounding wire of the AC cable, and that grounding is also attached to the power supply case and therefore would be attached to the metal of the computer case as well (because you use metal screws to screw the psu to the case and the psu case is in contact with the metal of the computer case - it's done like that on purpose)

 

Your AVR may have some circuitry or something that prevents the grounding wire from discharging that energy that's leaked, and therefore the energy goes instead through you and you feel that buzz/tingle/ whatever.

 

An easy fix would be to attach a wire to the metal part of your case and connect it to the grounding pin of a AC outlet/socket, working around the AVR.

[suedseefrucht]

52 minutes ago, Jeybsss said:

even though my pc is turned off i can feel electric shock

Here is a topic like this, I remember: Current Leakage - What can I do? - Power Supplies - Linus Tech Tips

If a device doesn't have an earth prong, there might be Y capacitors against disturbances. These can lead to charge the connectors to N level. If there is a level difference between N and PE in your house, this can cause a small discharge through your body.