I have just recently obtained my Road Show. I've been in the process of fixing minor issues like replacing bulbs, replacing sockets, and such. After I replaced a pop-bumper light socket, I fired up a game and realized that an entire column (column 3) is out. These switches are mostly on the right side of the game.
I can diagnose and fix small things, but I have no clue where to start on a matter like this. I have a multimeter, but am not really sure what to check. Any help and advice on where to begin and how to fix would be greatly appreciated.