The first step in solving this issue is to make sure that the calculator is in the correct mode for text entry. Press the "MODE" button and select "TEXT" from the menu. This will enable text entry mode and allow you to type on the calculator.
This could be due to a low battery or a technical malfunction. Try replacing the batteries and if the issue persists, try resetting the calculator by pressing the "2nd" button followed by the "ESC" button.
To enter special characters or symbols, press the "2nd" button followed by the "ALPHA" button. This will bring up a menu where you can select the desired character or symbol.
This could be due to a font or display setting. Try changing the font or display settings by pressing the "F1" button followed by the "F5" button. You can also try adjusting the contrast by pressing the "2nd" button followed by the "UP" or "DOWN" arrow keys.
Yes, you can save the text by pressing the "F2" button followed by the "F1" button. This will bring up a menu where you can select "Save" and then choose a location on the calculator to save the text.