Hello again. Someone was kind enough to help me locate the Advance unit on my Williams Skylab pinball that illuminates the word SPACELAB one letter at a time as you advance in scoring. The problem is the letters blink as you score and advance but they don't stay lit. They also blink one at a time and go off as the score is being added after the ball goes out but again they don't stay lit. I need to adjust this Advance unit so that the individual lights come on and stay on as the score is advancing. Any help instructing me how to properly adjust this would be most appreciated.