Question about Texas Instruments TI-89 Calculator

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How can I revive my TI89 after two years of not using it?

How can I revive my calculator after two years of not using it. The bateries are completely depleted. I changed them (4 AAA) and nothing happens.

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  • 88 Answers

It could be that you need to replace the backup battery located behind a little door with a screw in the battery compartment. If this doesn't work, try resetting your calculator by leaving backup and AAA batteries out for about 8 hours and reassembling it. Hopefulyy this will work. Good luck

Posted on Aug 06, 2009

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Posted on Jan 02, 2017

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I have a problem with TI89 calculator. The screen is frozen and I cant do nothing with it. Please help me out!


Having received no response in half a year, I assume my suggested reset solved the problem.

Sep 28, 2010 | Texas Instruments TI-89 Calculator

1 Answer

My ti89 won't turn on and i already 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.

May 20, 2010 | Texas Instruments TI-89 Calculator

1 Answer

How do i turn my "DiagnosticOn" on my TI-89?


If you open the CATALOG of commands, you will not find a DiagnosticOn command. It does not exist for the TI89 because whenever R and R2 correlation coefficients are meaningful they are calculated by default and displayed on the screen where you get the regression equation. If they are not defined bu the statistical theory no R or R2 are calculated.

In short You do not need a DiagnosticOn command to have R and R2 calculated. If the regression model uses them, they will be calculated by default.
By the way, DiagnosticOn is a command for the TI83/83Plus/84Plus but not for the TI89/89Titanium/92/92PLUS/Voyage 200PLT.

Apr 06, 2010 | Texas Instruments TI-89 Calculator

1 Answer

My TI89 wont turn on. My back up batery is no good and not in is this a problem?


Hi,
The calculator must have a backup battery in. It will supply energy to the memory module when calculator is turned off. You may lose the content of the memory.
I do not want to sound dramatic, but you may lose the OS and you would have to reinstall it. Put fresh batteries and see if your calculator is still operable.

Hope it helps.

Dec 08, 2009 | Texas Instruments TI-89 Calculator

2 Answers

I received this solution, but at the end the calculator asked me about some invalid certificate. Now the ti 89 is stuck at the boot screen because if I retry, it goes thru the whole process again and asks...


Hello,
The answer I gave you was taken verbatim from the TI FAQ and knowledge base. I copied and pasted the part relevant to you calculator.
In any case, I sent an e-mail message to ti-cares@ti.com, giving the link to your original question and my answer to it. I took the liberty to copy/paste your present message. I also asked about that invalid certificate.
All we can do know is wait for their reply.

k24674.

Oct 31, 2009 | Texas Instruments TI-89 Calculator

2 Answers

TI89 batteries rusted


you need to replace all the battery leads in there but yes you can revive this just do to radio shack and by the battery leads pop open that device and solder the new leads in.. if you do not know how to solder then it can get trickey..

Oct 03, 2009 | Texas Instruments TI-89 Calculator

4 Answers

Cube roots on ti89


The TI-89 has one function to find whatever root you want of a number.

To find the cubed root of say...64, you would type:

root(64,3)

Sep 15, 2008 | Texas Instruments TI-89 Calculator

1 Answer

TI89


I had mine for 15 years. Are the batteries in correct? Might be broke

Aug 24, 2008 | Texas Instruments TI-89 Calculator

1 Answer

TI89 buttons not functioning


SEND IT INTO Ti, LET THEM CECK IT OUT, FOR A SMALL FEE IT'S WELL WORTH IT.
IT'S BETTER THAN BUYING A NEW ONE, PLUS THAY WILL
FIND THE PROBLEM AND INTSTALL THE LATEST VERSION SOFTWARE IF NEEDED TO BRING IT UP TO LATEST CONFIG, AS THAY DID TO MINE.

Nov 18, 2007 | Texas Instruments TI-89 Calculator

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