On Friday, by order of the Illinois Gaming Board and Waukegan-based WMS Industries, about 1,200 slot machines were turned off. The machines were turned off after the discovery they were vulnerable to cheating.
The machines are shut down until WMS could fix them. The slot machines are about 13.5 percent of the state’s 8,882 slots. Employees at a Detroit casino found a defective bill acceptor on some of the WMS machines which could give players extra credits.