20 Most Recent Texas Instruments TI-86 Calculator - Page 9 Questions & Answers


Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key until the screen lightens. If you go too far, press and release the 2nd key and then press and hold the up-arrow key.

Texas... | Answered on Sep 13, 2010


In the MATH MISC menu you'll find the xth-root function. Use this to find the 5th root.

5 xth-root 32 ENTER will give 2.

Texas... | Answered on Sep 13, 2010


In the MATH MISC menu you'll find the xth-root function. Use this to find the 3rd root.

3 xth-root 8 ENTER will give 2.

Texas... | Answered on Sep 13, 2010


Try adjusting the contrast by pressing 2nd and down
Happy Calculating

Texas... | Answered on Aug 28, 2010


Hello, First of all no; it is not normal for your screen to be black. How can you enjoy the wonderfulness that is Ti with a dark screen. For the solution; it sounds like your contrast needs to be adjusted. Hold 2nd and down. The screen should lighten. If it reaches about where you can not see the cursor, then press 2nd and up and this will darken it. Hope this helps; Happy Calculating

Texas... | Answered on Aug 27, 2010


From the MATH menu (when it says num and under it sum), press NEXT. You'll then see the >FRAC command which tries to convert a decimal to a fraction.

Texas... | Answered on Aug 25, 2010


Whenever the screen is full and a line with calculation result comes up at the bottom of the screen, the screen all of a sudden shows things in a weird way and can't be read. By press "2nd+mode"(=quit), or try reset button (a small hole which a pin can only be used to press it to RESET. Gud Luck

Texas... | Answered on Aug 25, 2010


The Screen Was knocked out of place, the problem is pretty much just a moved part from the drop. you should probably get someone to repair it. I do not recomend attempting to fix it yourself, this can result in even bigger problems with the calculator.

Texas... | Answered on Aug 25, 2010


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.

Texas... | Answered on Aug 23, 2010


I hadn't used mine in years and had the same problem. Essentially you just need to give it a workout to get all the pixels working properly again and then it'll be just fine. I adjusted the contrast between full dark and nothing multiple times and turned the calculator on and off after each cycle and now it works like new.

Texas... | Answered on Aug 17, 2010


Adjust the contrast. Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key until the screen lightens. If you go too far, repeat the process using the up-arrow key instead of the down-arrow.

Texas... | Answered on Aug 17, 2010


The >Frac command on the second page of the the MATH/Misc menu will display the current value as a fraction.

Texas... | Answered on Aug 12, 2010


Having gone over a month without a response, I assume this is no longer a problem.<!-- from fixya rte -->

Texas... | Answered on Aug 11, 2010


calculate it with another one and or talk to the teach!!

Texas... | Answered on Jul 15, 2010


Don't you mean CR1616? The TI-86 can use either the CR1616 or the CR1620 battery. The -20 is slightly thicker than the -16 but there is enough flex in the system to accomodate it.

Texas... | Answered on Jul 08, 2010


Having gone over a month with no response, I assume this is no longer a problem.

Texas... | Answered on Jun 18, 2010


I had the same problem as this. This is because when you might have changed the contrast on your calculator when your old batteries were running low and you need to reset the contrast. Here is what you do:

press the orange "2nd" button, then press the "down arrow" button, then the orange "2nd" button, then the "down arrow". do not press the buttons at the same time only one after the other and KEEP GOING. The screen will eventually lighten up and you are all set.

Texas... | Answered on Jun 14, 2010


Adjust the screen contrast. Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key for a few seconds until the screen lightens.

Texas... | Answered on Jun 10, 2010


Yes. Look in the calculus menu (2nd [CALC]). You'll find nDer, der1, and der2 for numerical differentiation and fnInt for numerical integration.

You'll find full details on these functions in the "Math, Calculus, and Test Operations" chapter of your guidebook. If you need a new guidebook, you can download it from http://www.education.ti.com

Texas... | Answered on May 30, 2010


Turn the calculator on. Press and release the 2ND key. Press and hold the down-arrow key until the screen lightens.

Texas... | Answered on May 14, 2010

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