20 Most Recent Texas Instruments TI-86 Calculator - Page 4 Questions & Answers


Press and release the 2nd key and then press the up-arrow to darken or the down-arrow to lighten. Repeat as needed.

Texas... | Answered on Sep 21, 2012


Press and release the 2nd key and then press the up-arrow to darken or the down-arrow to lighten. Repeat as needed.

Texas... | Answered on Sep 21, 2012


How do I adjust the brightness of the screen?

Texas... | Answered on Sep 20, 2012


One source for games (and other program) is here.

Texas... | Answered on Sep 16, 2012


I got frustrated with mine so I started to press the 2nd, then releasing, then hitting the down arrow, and back and forth... and it worked! Please try this instead, it worked and I've been trying to use the hold and press this and that, but the alternating worked better!

Texas... | Answered on Sep 16, 2012


The TI-86 uses a very small, very thin ribbon cable to connect the display board to the LCD. The cable is about 2.5 " wide and about 4" long, and is only slightly thicker than a piece of paper but has about 40+ leads buried inside. Over time the leads will break at the folds (there are at least two folds in this cable to fit it down inside the case). There is no cheap solution to fix this problem. You might have some "Mr. Fix-it" try to fix it, but he will tell you to throw it away after he renders it completely inoperable. The calculator uses two Torx bit screws at the bottom of the case (T-6 size) so you will have to get the correct screwdriver to open the case. Save your money, sanity and time and use it till you can't stand the missing lines and throw it out. Even the data cable looks like it is glued down so if it lifts off after being cooked or frozen a couple of dozen times in the back of your car you can't fix this.

Texas... | Answered on Sep 02, 2012


because you break your LCD...

Texas... | Answered on Sep 02, 2012


Try this, hook up new battery and go to MODE and darken and lighten the screen.. do it ten to fifteen times. if that doesn't help, try hook up most left and most right's battery terminal to a DC supply at 4.5V. dont go above 4.5 it will fry your calc (it is design to handle 3V). now you are forcing extra juice into the dead LCD screen lines... and reapeat the MODE + darken trick. I fixed mine like that! Works! and remeber to leave it completely black(darkest) for a while to keep that dead line alive!

Texas... | Answered on Sep 02, 2012


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 the screen is completely black, go the other way, using the Down-arrow instead of the Up-arrow.

If this doesn't do it, please reply to this post and we'll go on from there.

Texas... | Answered on Aug 31, 2012


Enter the numerator, press the divide key, enter the denominator, press the ENTER key, then press 2nd [MATH] F5 NEXT F1 (to select the >Frac command).

Texas... | Answered on Apr 20, 2012


Error 14 undefined may occur if you are referencing a variable that currently is not defined

Texas... | Answered on Apr 03, 2012


(1/2.5 x 10^6)^)(1/3)=0.07368

See captured images


3_22_2012_7_29_22_am.jpg

Texas... | Answered on Mar 22, 2012


(-27/125)^(1/3)=-3/5

For better understanding of this problem see captured images below
3_20_2012_12_41_12_pm.jpg


3_20_2012_12_44_25_pm.jpg

Texas... | Answered on Mar 20, 2012


For this problem you have to type solve(5(a+3)-a = -(4a-6) +1,a)
See captured image


3_1_2012_9_56_39_pm.jpg

Texas... | Answered on Mar 01, 2012


If you are doing base N calculations
You may have entered a wrong digit (binary: digits are 0 and 1; octal : digits are 0,1,2,3,4,5,6, and 7) OR
You are trying to do calculations that are not valid in Base N.

Texas... | Answered on Feb 27, 2012


Press [2nd][MODE] to enter the default setup screen. On the third line Radian, Degree, highlight degree and press ENTER. From then on, angle values will be interpreted as degree values.

Texas... | Answered on Feb 27, 2012


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 reply to this post and we'll go on from there.

Texas... | Answered on Feb 17, 2012


This may sound silly but check that you put the batteries in the correct way round for (-) and (+)?

Texas... | Answered on Feb 17, 2012

Not finding what you are looking for?
Texas Instruments TI-86 Calculator Logo

326 questions posted

Ask a Question

Usually answered in minutes!

Top Texas Instruments Office Equipment & Supplies Experts

k24674

Level 3 Expert

8081 Answers

Ekse

Level 3 Expert

13434 Answers

Gene Pitts

Level 2 Expert

159 Answers

Are you a Texas Instruments Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Texas Instruments Office Equipment & Supplies

  • Texas Instruments Office Equipment & Supplies

Most Popular Question

find cube root

  • Office Equipment & Supplies
Loading...