Solution 40491: Troubleshooting a TI-84 Evo That Will Not Turn On, Charge, or Function Properly.
What troubleshooting steps can I try if the TI-84 Evo is not turning on, charging or functioning properly?
IMPORTANT SAFETY NOTICE: To ensure the most stable charging experience and protect the longevity of your device, please use a standard USB power source. TI recommends charging via a TI wall charger or other UL-certified USB charger rated for 5V/1A. While most modern "Smart" chargers are compatible, please avoid using high-wattage "Fast Chargers" or laptop power bricks when charging your calculator.
Please Note: The resets described in the troubleshooting steps below may cause a loss of applications, programs, and data. If at all possible, please backup all your files by copying data files and programs from your calculator to a folder on your computer using TI Connect Evo
Additional Note: Please ensure that there are no buttons that are stuck down below the keypad.
Please use the links below to quickly move to the section you need:
Calculator will not turn on or charge
Calculator will not function properly
Calculator will not turn on or charge:
1) Verify the Power Source and USB Connection
• Check the USB Connection: Ensure the USB cable is completely pushed into the calculator's port. There should be no metal visible. A loose connection will prevent the device from detecting the charger.
• Inspect the Port: Check the USB port for any dust, debris, or bent pins. You may use canned/compressed air to clear the port. Please Note: Physical damage to the port, such as bent or missing pins, is not covered under warranty.
• Verify the USB Cable: Ensure you are using the USB cable provided with your calculator.
• Verify the Power Source:
• Best Practice: Connect the calculator to a computer USB port or TI wall charger or other UL certified USB charger rated for 5V/1A
• Avoid: High-voltage "Fast Chargers" or proprietary high-wattage laptop adapters.
2) Hardware Power Cycle If the connection is secure and the power source is verified, please follow the steps below:
1. Remove the Battery: Open the battery compartment, remove the battery, wait approximately 3 minutes, and then reinsert the battery.
2. Reset: Locate the reset button on the back of the unit. Press and hold it for at least 5 seconds.
3. Attempt to Charge: Connect the calculator to a computer or a standard 5V wall adapter and allow it to charge for at least 3 hours.
3) Battery Life Check If your rechargeable battery is more than 3 years old, it may be reaching the end of its
natural life cycle .You can order a replacement battery at the the TI-Online Store at:
https://epsstore.ti.com or by
calling TI-Cares
4) Reinstall the Operating System (OS) If the calculator powers ON after following the above steps but responds erratically, try reinstalling the OS by following the steps below:
1. Hold the [2nd] and [Del] keys down, then press and release the RESET button on the back.
2. The message "Installing OS & Apps" should appear. Use TI Connect Evo on your computer to transfer the latest Operating System to your calculator.
If your calculator still will not charge or turn on, please contact TI-Cares for technical support and additional service options.
Calculator will not function properly:
1) With the calculator turned on press [2nd] then [< >] to access the memory menu. Next press [7] to access the reset menu and press [2] then [2] to restore default settings and verify if the issue is resolved.
2) If not press and hold the reset button on the back of the unit for at least 5 seconds.
3) If still not functioning properly use the TI Connect Evo to transfer the latest Operating System.
4) If your calculator still is not functioning properly, please contact TI-Cares for technical support and additional service options.
