The Casio fx-4000P is a programmable calculator with 12 digits precision and algebraic logic. It has 44 keys, and an LCD (liquid crystal) display. The power source is 2x3V cell. The calculator was manufactured in Japan.
Facts at a glance:
|Power Source||2x3V cell|
You can download the Casio fx-4000P manual from this external link.
If you have a Casio fx-4000P that is no longer working, you can first try replacing the 2x3V cell batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: