Playing Future Spa sometimes the 5k light at the kickout comes on with the 3k or 7k lights. I've changed out the lamp driver on the board for the 5k lamp. Didn't fix the problem. I've changed out the lamp board entirely with another one. I've even swapped out MPU boards (but using same game ROMs). None of those fixed the problem. I don't see anything obvious in the wiring or connectors. What have I missed?