From what I've seen posted in the past year of the reel stop board faulting always seemed to do with the stop buttons not working. Seems that the credit dump button is a whole different situation. Could it be a faulty button, connection, or a resetting fault, I am clueless at this time.

Stepping back to the beginning for a moment toby_vc, was this machine working for you in the past or did you you get the machine with this existing problem? Just wondering if someone else will be along to confirm if this is the correct power supply inside.