Calculator Isn't Charging, Cable Seems To Work However. - IFixit

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Texas Instruments TI-84 Plus CE

The TI-84 Plus CE is a graphing calculator released in Spring 2015 by Texas Instruments. It includes a 2.8 inch color screen, USB port, apps, storage, and a 1200 mAh battery.

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PLProductions @plproductions

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Posted: Dec 31, 2018

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Calculator Isn't Charging, Cable seems to work however.

For the record, I’m not using the original power supply that came with the calculator to charge, however it should do fine. (1A 5V) When I plug the cord into the calculator, the red light appears, then the calculator turns on. The red light starts flashing. The calculator does not seem to acknowledge the charging. The strange thing was that when I removed the battery, the light just stayed green, but the calculator wouldn’t turn on, so the cable is working, right? When I hit the reset switch, the red light becomes solid, but as soon as I let go, back to blinking. Any advice would be helpful, thanks.

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TheLastMillennial @thelastmill

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Posted: Dec 31, 2018

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Just to clear one thing up, the calculator can not run just off of the cable. It is expected behavior that when you remove the battery and just plug the cable in that the light turns green. :)

I Looked into the flashing red light and I think means you have an improper power source. My best guess is your power brick is faulty. Can you try a different power brick or connecting the calculator to your computer and see if it will properly charge?

You might be able to get more information about this by running a self-test.

Press [mode]

Press [alpha]

Press [S]

Press [enter] three times

Press [3]

If you need help with this there is a video about it here. This will tell you if the calculator is charging but it might also tell you if something is wrong with the connection.

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4 Comments:

Thanks for replying, you cleared some things up for me. I ran the test, and then plugged it in to the same supply, then reran the rest, and now the charging is working. I'll write if it fails at any point, and if not, will accept this answer. Thank you.

Dec 31, 2018 by PLProductions

Great, I'm glad it's working! Let's hope it stays that way.

Dec 31, 2018 by TheLastMillennial

@plproductions Still working for you?

Jan 8, 2019 by TheLastMillennial

this saved my calculator, thank you so much!

Dec 7, 2020 by nes

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