I am running a Ni-Wumpf Rev E in a Gottlieb System 1 (Asteroid Annie). Game functions perfectly until I try to access diagnostic sub menus. Here's the scoop.
If I press the inner coin door switch, I can toggle through all the diagnostic menu options. However, as soon as I press the credit button to enter a sub-menu, the game freezes. What I mean by this, is that pressing the inner door switch or the credit button yields zero results. The game is simply stuck at that menu option. If I reboot either at the reset switch on the board or main power button under the cab, I get the same results.
Again, game plays perfectly...I simply cannot change any options, test any switches, etc.
Thanks in advance!