The Texas Instruments TI-89 and TI-89 Titanium calculators are capable of running Flash-based programs. Sometimes, however, these programs can cause the device to freeze. If your TI-89 is showing an address error, it won't respond to normal input. You can reset it and return the calculator to normal operation using the keypad. After you reset the TI-89, you may need to adjust the contrast if the screen is too light to read.
Press and hold down the left and right arrow keys and the "2nd" button.
Press the "On" button.
Release all of the keys.
Tips & Warnings
- Hold down the "2nd" button and press the up or down arrow keys to adjust the contrast.