A factory reset is required. Please note that saved files and programs may be deleted during this reset.
Ensure that there are no buttons that are stuck down below the keypad and please ensure that the reset button located on the back is not stuck down below the bottom case. If it appears stuck, use a paper clip to move it back into position.
Step 1: Press the reset button on the back of the calculator.
Step 2: Hold down the reset button for 5 seconds. Release the reset button, press and hold the [doc] [enter] and [EE] keys, and press and release the [on] key.
The calculator will display a menu with the following maintenance options:
1. Format File System – This will delete the user’s documents, but will not delete the OS.
2. Delete OS – The operating system will be deleted without deleting any documents.
0. Reboot – No changes are made, the calculator restarts
3) Delete the OS by pressing  then on the new menu  and finally  to reboot the calculator. After completing this step you will need to reinstall the OS.
Please ensure that you have installed the TI-Nspire CX or TI-Nspire CX CAS Student Software and the latest OS for your calculator.
Step 4: To transfer your updated OS to your calculator, please see our guide.
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