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Black screen - Texas Instruments TI-89 Calculator

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Try adjusting the screen contrast. Turn the calculator on. Press and hold the diamond key and press and hold the - key for a couple of seconds to lighten the screen. If you go too far, use the diamond and + keys.

If this doesn't do it, please reply to this post and we'll go on from there.

Posted on Nov 08, 2010

  • mayianister Sep 04, 2011

    I tried and still it doesn't change. It turned from just black screen to dotted black screen with columns of vertical lines.

  • kakima Sep 06, 2011

    In that case, you appear to have a broken calculator.

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