Question about Texas Instruments TI-83 Plus Calculator

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Weird lines, characters, symbols etc.

My calculator turns on, but anything I type in comes up as weird lines, characters, and symbols. Nothing is legible. The screen does not say "Batteries are low." I have replaced the AAA batteries just in case; I tried them in other devices and they worked in them but I still get the mess on the calculator screen. Do I need to change the lithium battery? I've had this for a number of years and never changed that. Or is it software issue?

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  • zimmer_steve Oct 02, 2008

    Changed AAA batteries, and now screen displays random mess of symbols



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It sounds like you need to put in a new set of back-up batteries. They can be found behind where the AA batteries are.

Posted on Aug 27, 2007

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Have you enabled the On-screen keyboard feature in control panel?

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Would it help if I told you that all the precision you are apparently looking for has no meaning?. In any number resulting from a scientific calculation only a limited number of digits are truly significant.
If you are entering characters (numbers, symbols, letters, etc.) the calculator keeps accepting them until its memory is full. At this point the cursor changes and go from a solid rectangle to a checkerboard-like rectangle, and you cannot enter anything anymore.

But if you are calculating some meaningful expression, the calculator displays the result according to the display mode you selected: Normal, Scientific, or Engineering). However, even in normal mode, if a number is too small, or too large, the calculator displays it in scientific format.

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Let us count the number of possible characters in a display
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Try playing with the number 987654321123456. All you will see is 9876543211E12. The 23456 sequence disappears, and all that "precision" is lost. Why, may I ask, should you worry that your calculator is not displaying more that 13 characters on the left.

This is what I understood from your one-liner of a question. And because it is a rather cryptic one-liner, I may have gotten the whole problem wrong. If that be the case, do not just shoot down the answer, post a comment to the solution describing what you are trying to do. If it is a bona fide worthwhile concern, I will do my best to help you with it. If on the other hand, it is jus plain idle doodling I will leave it at that.


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