koroshiya8 wrote:
hi, yes it does...
my experience is that whenever i reach to the back to meddle with the cables i will avoid touching the surface as there seems to be some Current/static flowing thru.. not a good feeling. 
I think internally the grounding isn't so good. You could try to get a cable and touch another metal surface elswhere.. or use a conditioner with a grounding cable..
Anyways I seldom go back there too. But BEWARE. Never hot unplug a HDMI cable especially if your back panel is live...