The board doesn't supply voltage to the lamps, it's purpose is to provide a path to ground for each lamp. The only voltage on the board is 5V for the logic.
Check the wiring under the playfield that daisy chains your non-working lamps together. At the end of the bare wire there should be an insolated wire soldered on, which comes from the rectifier board. Either the wire has broken off or there's no connection in the plug on the rectifier.