Texas Instruments TI-84 Plus
The Texas Instruments TI-84 Plus 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 4xAAA + CR1620 3V. The calculator was manufactured in Taiwan.
Facts at a glance:
|Power Source||4xAAA + CR1620 3V|
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.
Press MODE, ALPHA and S keys simultaneously. Press ENTER when prompted.
If you have a Texas Instruments TI-84 Plus that is no longer working, you can first try replacing the 4xAAA + CR1620 3V batteries. If that doesn't solve the problem, then a repair might be possible, although you have to weigh up the costs against just buying a new one, as this model is still currently available.