Quoted from jdapolito:
in fact the bulb that is there just to illuminate the instruction card on that side doesn't work either
Start with the socket for that bulb. One side of the socket should go directly to one of the general illumination fuses. The other side should go to one of the transformer terminals.
Unplug the game an try to trace both wires back from that bulb to the fuse and transformer. There's an open circuit somewhere. Maybe at the jones plug?