Try locating and buying Whitestar CPU boards. Even Stern don't know the part number !
Are they the boards used in twister Nino?
Peter
Different revisions, Peter. The Whitestar Board I've tried chasing up with Stern (for around 3 months) is 520-5300-00. I've been back and forth with distributors and Stern "tech support" several times. All I can say is if you own a late model Stern, change the batteries often, as Stern don't even know the part numbers or revisions of their own boardsets, AND if any are available ! you would think their "engineers" would factor in a remote battery pack after learning from the mistakes of the 70's manufacturers ?