I can't figure this one out. I have 5 new Wolffpac tech score displays. I have new Rottendog solenoid board. I am working with 1978 Lost World. I had problems with old score displays. (Burnt traces, burnt resistors,etc). Now I install all 5 new Wolffpac displays and none work. I swap my old ones in and I get some digits. So I can't see all 5 new displays not working, I know power is getting to the displays as proof with old displays getting life. My self test button is not working so that doesn't help. The Wolffpac tech people have been very helpful with suggestions but I am at a lost. Any ideas or people who have experience with this.