Question about Texas Instruments TI-86 Calculator

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My Ti-86 wont turn on after i change batteries

I didnt use it for a yeah !

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

Posted on Feb 17, 2012

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Posted on Jan 02, 2017

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SOURCE: it wont turn on

On TI-83 Plus and TI-83 calculators that have the newer flat screen (as opposed to the first generation TI-83 with the tilted screen):

1. Open the battery compartment cover
2. Install known working batteries
3. Using a voltmeter, insert probe ends into the holes right beneath the 2 center batteries and touch the circuit board on either side. One is a (+) side and the other is a (-) side, so both must be touched. Be careful to ONLY touch the copper square of the circuit board. If your voltage reads 0 or very low (1-2 volts) proceed to step 4. If your voltage reads about 6 volts, your problem lies elsewhere.
4. Using a voltmeter, insert probe ends on the bottom of the 2 outside batteries where the springs are visible. If voltage reads about 6 volts, proceed to step 5. If voltage reads 0, your problem is that the springs are not making good contact with the batteries due to corrosion or weak springs. You will need to clean them or get donor parts. Find a calculator with a broken screen that comes on and swap the back covers. Details on how to remove the back cover further on.
5. Using a T6 torx electronics screwdriver remove all 6 screws on the back and using a small phillips, remove the backup battery cover.
6. WARNING! Disassembling your calculator can cause unrepairable damage. Only proceed if you have no other options! Using a small flat electronics screwdriver, pry into the case on the side about 4 ridges up where there is a small hole. Pop both sides open and break case away from the bottom to the top- NEVER FROM SIDE TO SIDE. (Going from side to side can damage the I/O port.)
7. Look at the copper squares at the bottom of the board. You can see where 2 springs make contact from the back cover. Often this is dirty, corroded, or the springs are weak and not making contact. Clean this area with alcohol and gently scrape away any oxidation.
8. Put calculator back together and test. When a calculator will not turn on, this is likely the culprit.

I have fixed several calculators with this method.

Posted on Dec 17, 2007

  • 2 Answers

SOURCE: TI 86 No display screen

try this
http://education.ti.com/sites/US/downloads/pdf/TIGraphingCalculatorCare.pdf

Posted on Aug 08, 2008

  • 7993 Answers

SOURCE: IT-86 Both batteries removed, now dead

Hello,
Use the TIconnect or TIGraphlink software to reinstall the programs. You will find the programs in the TI Program archives.
ftp://ftp.ti.com/pub/graph-ti/calc-apps/86/.

Hope it helps

Posted on Sep 23, 2009

  • 7993 Answers

SOURCE: TI 86

Hello,
If batteries are inserted correctly you can adjust the contrast
Press [2nd] key and release it
Press and hold [UPArrow] key to darken till contrast is dark enough.

To enlighten screen, do as above but use the [DownArrow] key.
Hope it helps.

Posted on Sep 23, 2009

  • 102366 Answers

SOURCE: ti 86 will not turn

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 Aug 23, 2010

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Related Questions:

1 Answer

How do I reset my TI-86 after a long period of no use.


Every time you change batteries this will happen to you. First press 2nd then press and hold the down arrow. Hold until their is no black in the background but you can still see the numbers on the screen.

Sep 05, 2014 | Texas Instruments TI-86 Calculator

1 Answer

My Ti-86 wont turn on after i change the batteries


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

Feb 17, 2012 | Texas Instruments TI-86 Calculator

1 Answer

I've had my ti-86 for a very long time & recently it just quit working. I changed the AAA batteries & the back up battery & it will not come back on. Please help???!!!!


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. Does it?

Dec 02, 2011 | Texas Instruments TI-86 Calculator

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

I have TI-89. I didnt use it since 2 years. but now after changing its battery it showing me just black screen with many straight lines. What should i do


Take out one battery. While holding the "On" button, put the battery back in. It may take more than one attempt, but it should start working again. Tell me how it works out, and hope this helps!

Oct 10, 2010 | Texas Instruments TI-86 Calculator

1 Answer

Ti 86 will not turn on (I replaced the batteries).


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.

Aug 23, 2010 | Texas Instruments TI-86 Calculator

2 Answers

Switched the TI-86's batteries but im getting a black screen


Hi,
After changing the batteries the calculator is o restored to factory defaults, but the screen contrast may change. The screen may be too light to see anything. Darken it a bit.
Press [2nd] key and release it.
Press and hold [UpArrow] until screen is dark enough.

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

Dec 01, 2009 | Texas Instruments TI-86 Calculator

2 Answers

A friend gave me a TI-86 graphing Calc. I wont turn on!!!


maybe try changing the small memory battery inside, I think its a cr1616 or cr1620. If this doesn't work use it as a paperweight.

Apr 23, 2009 | Texas Instruments TI-86 Calculator

1 Answer

IT-86 Both batteries removed, now dead


Hello,
Use the TIconnect or TIGraphlink software to reinstall the programs. You will find the programs in the TI Program archives.
ftp://ftp.ti.com/pub/graph-ti/calc-apps/86/.

Hope it helps

Jan 18, 2009 | Texas Instruments TI-86 Calculator

1 Answer

TI 86


Hello,
If batteries are inserted correctly you can adjust the contrast
Press [2nd] key and release it
Press and hold [UPArrow] key to darken till contrast is dark enough.

To enlighten screen, do as above but use the [DownArrow] key.
Hope it helps.

Oct 24, 2008 | Texas Instruments TI-86 Calculator

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