Question about Texas Instruments TI-89 Calculator
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.
If this doesn't do it, press and hold the 2ND, left-arrow, and right arrow keys, then press and release the ON key.
If that doesn't do it, please respond to this post and we'll go on from there.
Posted on Sep 14, 2010
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Posted on Jan 02, 2017
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