Have you tried unplugging the computer to see if you Still get shocked ?
Are you plugged into a Grounded outlet?
Just thinkin' here
Hi friends,
it has been a while, my PC is giving eletrical shock when I touch my case even though the power source is turned off. The shock makes no difference if my PC is turned on or off and I'm concerned if this can be dangerous to it. Please, could someone who know about this help me?
Thanks!

Chowhound
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