The lamp mystery continues. My column 3 is out. If I pull the connector and use a wire to connect the molex to a different pin just to send a signal to those lamps, then it lights up the multipliers but NOT the top lanes. Tried plugging it into both J137 and J138, but neither turns on the lamps. They sometimes work very briefly or dimly, so I'm assuming its a loose connection somewhere, but then doing the above test, the multiplier lights are full power whereas the top lanes are absolutely nothing.
The bulbs work, as tested in another working socket.
I am really at a loss for wtf is going on.
Update after that test, so this pin is the only pin on the connector that barely registers any voltage. Does that mean I have a board issue?
Another update that maybe related? Testing single lamp in row 3 also activates the corresponding column in row 6, but the reverse is NOT true.
Another oddity: the Advance in Rank/Command Decision board in the top left. The Advance Rank is always off (bulb tests fine elsewhere) and the Command Decision is always on, even when the row connector is removed from the driver board. These happen to be on those same 3/6 rows. Coincidence?
In looking into the Advance Board, the molex looks super wonky. I assuming there should not be extra (non yellow and red) wires?