One work related experience I can think of is a time there was an error on a game, and because I was the only technician in that night, I had to troubleshoot (and hopefully fix the issue) by myself. It was an error with the display "right sensor/call tech"on a soccer game with a section at the back of it that housed all of it's balls. I started by checking the manual to see what the error meant, and I saw it meant that there was something blocking the sensor on the right side of the cabinet where the balls are held. The manual suggested that it was an issue of there being too many balls inside of the cabinet, therefore blocking the sensor, and to remove some to resolve the issue, I knew this wasn't the case though as I had checked how many balls were inside of it against how many were suggested and they matched up. After that I realized it could be anything blocking the sensor that could cause this issue, and decided to inspect it further, and after looking closer, I realized there was just too much dust and debris cover the sensor, and after cleaning it, the error cleared and it could be put back in operation.