This hack/exploit works on the following models:
fx570EX, fx991EX, fx82CN X, fx350CN X, fx95CN X, fx991CN X, fx530AZ, fxJP500, fxJP700, fxJP900, fx570AR X, fx991AR X, fx92 Speciale College, fx92B Speciale College, fx87DE X, fx991DE X, fx570SP X Iberia, fx991SP X Iberia.
This hack/exploit involves getting an empty box, which causes the calculator to act weird and then freeze.