Casio fx-7400G PLUS
The Casio fx-7400G PLUS is a graphing calculator with 10 digits precision and formula input logic. It has 406 functions, 50 keys, and an LCD (liquid crystal) display. The power source is 2xAAA + CR2032. The calculator was manufactured in China. A sample of this calculator is held in the calculator.org collection.
Facts at a glance:
|Power Source||2xAAA + CR2032|
You can download the Casio fx-7400G PLUS manual from the manuals website.
Note that diagnostic tests generally delete any data on the calculator. Be sure to back up any important information held in the calculator before running these tests.
Switch calculator off, then hold down arrow key (top right) and fraction (a b/c) keys and press AC. Choose from the test menu, or 0 to reset and exit. Use the EXE key to step through each test. For the keypad test, press each key indicated on screen.
If you have a Casio fx-7400G PLUS that is no longer working, you can first try replacing the 2xAAA + CR2032 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: