Quoted from Eric_S:
Anyone know anything about this daughter interface board on the under-playfield 6 digit display on my Stern Lightning? Specifically, will it cause any issues when installing LED displays?
Just found this...
Bonus / Timer Control Interface Board. Looks like it's using solenoid Q18 as part of the input to the board to derive an alternate blanking signal. It's doing some other funky things too.. so it has a specific function to change the normal display behavior for the playfield display in that game. Skimming the manual quick, I don't see a good explanation of how the board functions. But since it's plugging into a regular 6-digit plasma display, you should be fine with the LED displays in there.
Will be kind of interesting to hear if anyone else has further explanation on what the board is doing exactly. Looks like all Stern Lightning games would have that board connected to the playfield display.