Question about Texas Instruments TI-86 Calculator

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I stop using my TI-86 for a few months and know

I stopped using my TI-86 for a few months and know the screen is completely blank like it has lost all functions. Is that something that can be fixed?

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  • kakima Jul 06, 2010

    Try adjusting the screen contrast. 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. Does that do anything?

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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.

Posted on Jul 10, 2010

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I have not used my ti-86 for long time, when replaced the 4 AAA batteries it blinked and when off, I did that few times by removing and reinstalling the batteries. Then a message say fading in the center screen, "Mem cleared, Defaults set". What do I do?

Posted on Aug 17, 2010

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Posted on Jan 02, 2017

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SOURCE: TI 84 will not graph multiple functions simultaneously

Turn off transformers. Go to apps and go all the way down until you reach transformers then hit enter. Then a menu should appear and hit uninstall that should fix it.

Posted on Sep 13, 2008

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SOURCE: texas instruments ti-86 screen problem

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.

Posted on Jan 20, 2010

  • 1 Answer

SOURCE: How do you fix a TI-89 calculator whose screen is half dark?

use a metallic clip to put pressure along the top side of screen81cc2b4.jpg

Posted on Jan 26, 2010

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1 Answer

Hi. I changed the batteries on my TI-86 and when I tried to turn it back on the screen was completely black. Do you know what the issue could be?


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.

Nov 04, 2010 | Texas Instruments TI-86 Calculator

1 Answer

When i turn it on a blank screen shows up and i dont know how to make it go away can you help me?


Having received no response in over five months, I assume the suggested contrast adjustment solved the problem.

Oct 11, 2010 | Texas Instruments TI-86 Calculator

1 Answer

My calculator screen is completely black. How do


Turn the calculator on. Press and release the 2ND button. Press and hold the down-arrow key for a few seconds.

Apr 07, 2010 | Texas Instruments TI-86 Calculator

1 Answer

Why is my TI-86 screen dark when i turn it on?


Having gone over a month without a response, I assume it was just the screen contrast.

Apr 07, 2010 | Texas Instruments TI-86 Calculator

1 Answer

My TI-86 has a completely black background, please let me know how to fix it. thanks


Hi,
After changing the batteries the calculator is restored to factory defaults, but the screen contrast may change. In your case (even if you did not just change batteries) the screen may be too dark. Lighten it a bit.
Press [2nd] key and release it.
Press and hold [DownArrow] until screen is light enough.

Hope it helps.
Thank You for using FixYa and for rating the solution.

Nov 15, 2009 | Texas Instruments TI-86 Calculator

3 Answers

Blank lines across the screen of a TI-86 graphing calculator


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!

Jul 06, 2009 | Texas Instruments TI-86 Calculator

1 Answer

Blank screen with new batteries! TI-84 Silver Plus


ON, 2nd, [up] arrow to change the contrast. Works 99% of the time....

Oct 19, 2008 | Texas Instruments TI-84 Plus Silver...

1 Answer

Standard Deviation


Texas Instruments TI-86 Statistics How-To Information The following instructions should allow you to calculate the mean and standard deviation using a TI-86 calculator.
  1. Press STAT
  2. Select EDIT
  3. Enter data into a list: [2.32 ENTER 2.43 ENTER 2.39 ENTER, etc.] Continue until all data have been entered. (use arrows keys to go to the y value, if any)
  4. EXIT until you reach the main ("blank") screen. (If you try to calculate while you're in the data menu, it thinks you're still trying to enter data!)
  5. Press STAT
  6. Select CALC
  7. Select OneVa
  8. Select LIST, NAMES, xStat(F2), Press ENTER
  9. The calculator provides Max, Min, Mean, Standard Deviation, Sum, Sigma, etc. You will be primarily interested in the Mean and Standard Deviation (sx).

Nov 15, 2007 | Texas Instruments TI-86 Calculator

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