Hi guys I have mid 2012 MacBook Pro, I've got a GPU issue after upgrading to I guess El Capitan or Yosemite which affected my Mac battery and the screen's backlight which goes black. Few days later I decided to open it and see if I can fix it but accidentally I put the screwdriver between these things shown in the picture below a small spark comes out and the Mac died completely I want to know what are these things and what happened to my Mac. Before this it was working (the fan, the keyboard backlight, I was able to play music) but now it is completely dead.