Quoted from G-P-E:
As to the mention of not running without the reset board. Some boards refuse to operate properly without the DIP plug installed regardless of whether or not the reset board is connected. This is due to the addition of a pullup resistor that Gottlieb added during 80A days.
When this resistor is added - some of the boards come back to life.
Tell me more, as I have a unresponsive Raven taking up space in my basement. Which pins, how many ohms, any service bulletin to read?