Question about Texas Instruments TI-83 Plus Calculator

1 Answer

5 column pixels missing

I did not use my calculator for a while and when I turned it on there are about 5 columns that do not work. When I do the calculation...those 5 column figures are impossible to see. Any advice how to fix this?

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  • syp22 Oct 02, 2007

    How can I fix this? I have to admit I did drop my calculator a couple of times...

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  • 363 Answers

This sounds very much like the conductive rubber strip that is between the LCD display and PCB is not making contact. This can happen if the calculator has been dropped or bent.

Posted on Oct 02, 2007

  • Martin B
    Martin B Oct 02, 2007

    I am not familiar with this particular calculator but if you have nothing to lose if you ruin it...

    From experience with a casio I suggest first making a note/scan/picture of the button positions as they can fall out.
    Take out the battery(s) and find the correct screwdriver to undo the case screws.
    There may be several plastic catches to ease apart to remove the back.
    If you take your time and tease the case apart as gently as possible then you might not damage it.
    Inside there will be a circuit board with one side toward the keys.
    There may be more screws to remove to expose the LCD
    What you are looking for is a long strip of rubber between the glass of the LCD and the circuit board, it will have microsopic light and dark stripes across it. The light stripes are insulation and the dark are conductive rubber silicon.
    The one in my casio was about the dimensions of a long matchstick.

    This may not be making contact properly either because it is out of alignment or dirty.

    You might be able to reconnect the battery and see if you can get it working while in pieces.

    Good luck!

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1 Answer

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Step 1 - locate the column in question - in this case the hundreds column
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Step 4 - if this number is 4 or less, do not add 1 to the hundreds column
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Let me know if you have any questions.

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You need to post the question.

To round to the nearest hundredth, you find the hundredths column and look to the column immediately to the right. If it is 5 or more, you add one to the hundredths column. Delete all columns to the right of the hundredths column, and you are done.

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Step 1 - identify the column in question - in this case the hundreds' column is the second column, in this case the 5
Step 2 - identify the column immediately to the right of the column above - in this case, the tens' column
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Step 1 - identify the thousands column.
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Let me know if you have any questions.

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