The TI-84 Plus Silver Edition is a graphing calculator released in 2004. It includes a USB port, pre-loaded software, APPS, storage, and a removable front and back case.

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My buttons won't work

When I turn my calculator on, the calculator will not recognize when I push any of the buttons.

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unknown, I'd start with some basic trouble shooting. Remove the internal battery for a minute or two. If there are not results with it try to

- check for a stuck key

- reloading the software

- open up the unit and shake it out in case something is blocking the key contacts

- clean the circuit board contacts under the keys with an eraser

After that you are in for deeper testing. you would need a multimeter to check the resistance between the opposite halves of the keypads. For that you would of course remove the membrane. Low resistance between the two halves would indicate that it is shorted somewhere and would be interpreted as a stuck key. Use this guide to get to the keypad.

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Thanks for the suggestions - under the assumption it was a stuck key I spent a few moments "massaging" the keys, and after a bit, it worked just fine! Hope this helps someone avoid a more intense solution...

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I followed these directions and the calculator is now working. My gut instinct was that using the eraser did the trick because none of the keys seemed to be sticking. I am pleased but surprised! Thanks.

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Cleaned contacts first with eraser, then went over all the contacts with alchohol to clean them. I checked continuitiy and it seemed to work, and also checked resistance with respect to power. As power was only working button for me. I had around .7 ohms the whole way through every button up to 1.2 ohms. Sprayed all of the components with duster and went over all circuit board lines with qtip and alchohol. It worked. hope it helps someone else!

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unknown will be eternally grateful.
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