Casio PRO fx-1
The Casio PRO fx-1 is a programmable calculator with 10 digits precision and algebraic logic. It has 43 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA. Note: Memory : 127 keystrokes, 10 registers. Manually operated magnetic card unit.
Facts at a glance:
If you have a Casio PRO fx-1 that is no longer working, you can first try replacing the 4xAA 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: