Our recent results on {\em extended crystal PDE's} are generalized to PDE's
in the category QS of quantum supermanifolds. Then obstructions
to the existence of global quantum smooth solutions for such equations are
obtained, by using algebraic topologic techniques. Applications are considered
in details to the quantum super Yang-Mills equations. Furthermore, our
geometric theory of stability of PDE's and their solutions, is also generalized
to quantum extended crystal PDE's. In this way we are able to identify quantum
equations where their global solutions are stable at finite times. These
results, are also extended to quantum singular (super)PDE's, introducing ({\em
quantum extended crystal singular (super) PDE's}).Comment: 43 pages, 1 figur