First I'd like to say that I am new here and reading the threads I have found in the last several days have been extremely helpful.  I've been using Markrvp's restoration as a bit of a guide to restore a Donkey Kong machine I acquired several years ago that had been converted into a jamma cabinet.  Since the jamma harness and the pcb were already wired up it seemed as though I only needed the jamma to nintendo adapter so I purchased that and quickly installed it.  When hooking the board up now I only get a mario jumping noise that quietly loops in the background and the screen stays blank.  I thought this could possibly be the monitor but I tested another jamma board that I have and it worked fine.  My guess is that the  pcb isn't giving the appropriate  voltage to the board/monitor but since I am very new to the restoring game I really have no idea how to approach this situation.  Thanks!