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Question about Texas Instruments TI-89 Calculator

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I've tried numerous times to turn the calculator off, and it does so for a split second, but then it turns right back on. It seems the only way to turn it off is to take out the batteries? It used to work fine until a couple weeks ago. Any ideas?

Posted by gtbuzz on

  • Cam_G Apr 26, 2008

    I know someone has a solution for this, it has something to do with changing settings, but I can't find it again....
    Does anybody know? I'm not doing an update, I don't have a cable.

  • baseballneal Sep 16, 2008

    I can not get my TI-89 to shut off. When i turn it off, it shuts down and then powers right back up.



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I have just same problem.. but how i can clean under the on button?/

Posted on Apr 16, 2008



Under your On button might be some dirt, that keeps triggering the On button, and thus, keeps it on.
Clean under the On button

Posted on Mar 24, 2008


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The unit worked fine when i last used it in the fall. I plugged it back in today and all the buttons lit up for about 1.5 seconds and then all the buttons went dark again. So I pushed the "on"...

I have had a problem like this in the past you can try taking the electric access panel usually on the side of the equipment. then look inside you will see a wiring harness inside and it literally takes nothing to bump it loose. This happens when people move these units they are pretty fragile and can be tempermental. Make sure the unit is unplugged while you adjust the wiring harness. If that deosnt work your display board is probably bad. Hope that helps
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