The theory (for your original issue) is that there is something wrong in the circuit that HowardR redlined for you. To make progress, we need you to locate the components on that circuit path in your machine and then use the jumpering techniques from the links that HowardR also included in his post (in your previous thread) to identify the component(s) that is/are failing.
The components that need to be located include playfield switches, motor switches, relays, and the particular switches on a given relay. Clues as to the locations of theses components are given on the schematic, labels in the machine and wire colors (to positively identify/verify a particular switch or relay).
If you're not comfortable doing this, or learning how to do it, maybe you could find a friend or a local pinball enthusiast to help... because we definitely need the boots on the ground to do the testing and accurately describe the results.