Question about Texas Instruments TI-85 Calculator
Take out one battery. hold DEL key and put the it back holding that key.
It should reset everything. I had same problem on ti84
Posted on Mar 07, 2009
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Posted on Jan 02, 2017
The most likely cause is incorrectly placed batteries. (I know it from experience: It happened to me too).
Unlock the keyboard and remove it. Look at the polarity diagram on the body of the calculator, inside battery compartment. The positive terminals are towards the bottom.
To darken the screen press THE CTRL key and hold pressure. Press the + key until screen darkens.
Posted on May 18, 2010
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