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Old 11-10-2015, 11:16 PM
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sleepy sleepy is offline
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I'm not a pinball tech, but I found this:

https://groups.google.com/forum/#!to...ll/2LP4bqu_VtE

EDIT: The following might not apply to Williams circuits, and is not from the Google Groups link. This is my personal experience.
I had a Yamaha keyboard with a bad voltage regulator. It has an On/Off switch Pin 4 on a 4 pin package. I replaced it and got nothing until I accidentally shorted Pin 4 to ground. Then it worked. So as a last ditch suggestion with No Guarantees, if there is a voltage regulator with an On/Off switch pin associated with those connectors, UNPLUG THE MACHINE and try shorting it or the companion capacitor to ground. MAKE SURE THE POWER IS OFF.

Last edited by sleepy; 11-10-2015 at 11:43 PM.
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