Question about Texas Instruments TI-81 Calculator

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My TI-81 screen is so faint. How do I make it

My TI-81 screen is so faint. How do I make it brighter/darker?

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Turn the calculator on. Press and release the 2ND key. Press and hold the up-arrow key to darken the screen/increase the contrast.

Obviously, to go the other way you use the down-arrow key instead of the up-arrow.

Posted on Apr 23, 2010

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How do I increase contrast on the screen (make it darker and easier to read)


Turn the calculator on. Press and then release the 2ND key. Press and hold the up-arrow key until the screen darkens to taste. If you go too far, use the 2ND and down-arrow keys to lighten the manual.

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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 at all. 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.

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Grandaughter gave me her TI-81. I replaced all


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.

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