Question about Texas Instruments TI-81 Calculator

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Good Day, I have replace the batteries in my TI-81. But the calutator will not turn on. What else can I do? Martina Jacobs

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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 16, 2010

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Marc Jacobs battery replacement


Robert, take it into a jeweler, they do not charge much more then the cost of battery.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Jun 30, 2016 | Marc Jacobs Watches

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Mem cleared Changed out the batteries and received a messege mem cleared and nothing will work.


Follow this steps to resolve this problem:

1. Press ON to turn calcilator on

2. Press 2nd and then press + key button. TI- 81 displays RESET menu

3. Press 2 to select the RESET, the second item in the RESET menu. The display shows the message Mem cleared. Press CLEAR to clear the screen

If you cannot see anything on the screen, you may need to adjust the graphing TI- 81 calculator contrast:

-To darken the screen, press and release 2nd key, and then press and hold up-arrow key until the display is sufficiently dark

- To lighten the screen, press and release 2nd key, and then press and hold down-arrow key until the display is sufficiently light

Aug 22, 2012 | Texas Instruments TI-81 Calculator

1 Answer

TI-81 when turned on, screen is totally black, can perform calculations & barely see results on screen. is this a battery problem?


Adjust the screen contrast. Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key to lighten the screen. If you go too far, use the 2nd and up-arrow keys to darken it.

Aug 08, 2012 | Texas Instruments TI-81 Calculator

1 Answer

I have an older texas instrument Ti-81 that is in good condition. I have replaced the batteries, but the calculator will not turn on. What can I do?


Having gone over a month without a response to my query, I assume the suggested screen adjustment solved the problem.

Sep 16, 2010 | Texas Instruments TI-81 Calculator

1 Answer

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


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.

Sep 09, 2010 | Texas Instruments TI-81 Calculator

2 Answers

My TI-81 has completely stopped working. I have put in new AAA batteries along with a new CR1620 battery. Any suggestions?


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, please append a comment to this post and we'll go on from there.

Sep 07, 2010 | Texas Instruments TI-81 Calculator

1 Answer

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


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.

Apr 23, 2010 | Texas Instruments TI-81 Calculator

1 Answer

I have a TI-81 that stop working, I installed the


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.

Mar 16, 2010 | Texas Instruments TI-81 Calculator

1 Answer

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.

Sep 09, 2009 | Texas Instruments TI-81 Calculator

1 Answer

Took a battery out, put it back in and it wouldn't turn on.


Try replacing both the AAA batteries and the back-up batteries. This should probably fix the problem.

Feb 10, 2007 | Texas Instruments TI-81 Calculator

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