It would be pretty rare to have a duff panel, if your going to blow something you would likely only break one circuit. having all the circuits do the same makes me still think a programming option.
As I said I know Texe stuff pretty well but we rarely see international series over here, so I couldn't point you to the exact programming option from if that is what the issue is.
My advice for testing panels zones would be to remove ALL other wiring (to remove possibility of a ground loop) and only use short pieces of wire and/or resistors to test your circuits. I imagine you need to be in walk test/zone status or some other mode that would trigger if a zone where activated.