Quoted from slochar:If the flipper relays are missing for the non-fliptronics games it's not going to work.
The problem seems to stem from the sale of a one board for all WPC89 games, and it does not have the flipper relay nor the optocouplers installed for the non-fliptronic games.
https://pinballbasement.com/collections/wpc89-boards/products/a-12697-wpc89-power-driver-board