well, well....
What do we have here
That is old Gottlieb curse...game lock-up.
This happens to all system 3 games from Gottlieb,and in most cases the reset circuit on the mpu are bad.But in some cases the game will start when turned off and on many times....
If there is an seperate reset pcb to the cpu board, try to remove that one...NOT all games have it.
"Bally the Gottlieb killer"