Quoted from djriel:. It seems that there is more than 1 power line running to this display board. Reseating the connectors under the playfield (in the cabinet) have seemed to bring it back to life as it's worked the past 24 hours without an issue. So maybe one of the power lines wasn't making a great connection.
Hey there. I am having a similar issue. The bottom display on my TX Sector is occasionally dim. Did your issue ever come back or was it resolved?