IN the kitchen we have a four banger outlet, 2 double GFI's side by side. The one on the right stopped working a bit ago so I went to replace it today. It turns out it is the slave GFI and is connected in line after the main one and correctly at that. Changed them out wire for wire. The new one has a little green light on the bottom but still no power and the GFI switch won't reset. First one still works fine. Any thoughts?