Question about Texas Instruments TI-84 Plus Calculator
Try taking out the batteries, include the backup battery if you haven't already. Backup battery is located behind a little door with a screw right above the AAA batteries. Leave all out for a few hours before reassembling. Another problem might be that the backup battery may need to be replace. Hope this helps.
Posted on Oct 04, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
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Press the "n" button to display the quick nav bar.
In the quick nav bar, tap the Settings icon.
In the Device Settings section, tap Device Info.
Tap Erase & Deregister Device.
Stop. Think. Think again.
If you really, really want to do this, go to Step 7. If not, tap the Back button.
Tap the Erase & Deregister Device button.
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