Casio fx-7700GBus (POWER GRAPHIC)
The Casio fx-7700GBus is a graphing calculator with 10 digits precision and formula input logic. It has 50 keys, and an LCD (liquid crystal) display. The power source is 4x2032 3V cell. The calculator was manufactured in China. Note: fx-7700G with addition of "Bus" program-link. Chinese version, very subtle difference in display bezel. A sample of this calculator is held in the calculator.org collection.
Facts at a glance:
|Power Source||4x2032 3V cell|
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 F6 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-7700GBus that is no longer working, you can first try replacing the 4x2032 3V 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: