Question about Texas Instruments TI-81 Calculator

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I replace all the batteries and have a blank screen, is there a way of resetting the unit or what can I do?

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TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

Posted on Sep 09, 2010

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If its NEW take it back!

or
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http://www.tomtom.com/support/support.php?ID=2

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Go to the Garmin support area for details.

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