Question about Texas Instruments TI-89 Calculator

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My TI -89 won`t turn off

I just bought it a couple of weeks ago and it has been working just fine. As of today I can´t turn it off. I use the 2nd and  [off] keys,at first it turns off but after a second later it turns right back on. I tried the diamond key and then [off] but it`s same thing. I reset and still have the same problem, I also tried taking the AAA batteries but that didn´t help. I haven´t taken the backup battery out, I`m not really sure what kind of effect that might have on my TI-89.Among other things I tried resetting my memory to its original factory setting without any succesfull results.This calculator is brand new and I have taken very good care of it, I haven´t droped it or anything like that.

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  • Anonymous Nov 12, 2007

    i have the exact same problem and have tried everything above

  • Anonymous Nov 27, 2007

    AHHH! I have the same problem mine just started doing it...As a quick fix I have just been taking one battery out and then putting it back in when I need it

  • Anonymous May 29, 2008

    Had kind of a similar problem. My screen just went darker n i was lookin for the option that said screen display but there isn`t any... so just pulled out the batteries and the backup batteries too, put them back and it was like new again....

  • Anonymous Aug 13, 2008

    When I try to turn off the calculator, it turns off but turns on again by itself. I tried taking out and replacing the backup battery, pushing the left, right, 2nd, and on buttons together, and reseting the RAM, but nothing. PLEASE help!

  • Anonymous Nov 17, 2008

    Same with me. I got mine Chirstmas of 06 and have taken excellent care of it. I tried reinstalling the OS and changing batteries (even the backup) with no success. I had mine vertical at my desk for a while, the dust theory is feasible, we'll see after i clean it out.

  • xx09 Nov 26, 2008

    I have the same problem with TI-89 Titanium. I tried all those solutions: blew into the I/O and USB ports with my hairdryer, taking out the back-up battery, pushing <- -> 2nd and On buttons at the same time and reseting the RAM, and it still does not works. Any other solution?

  • Anonymous Jan 07, 2009

    Thanks a lot for posting this solution - the hairdryer solved my two year old problem when taking out back up batteries, updating firmware, clearing Flash and obscure button combinations didn't.

  • 51plus Jan 16, 2009

    I had the same problem so I removed both the backup and the 4 batteries


    keep them out for an hour or so.


    backup all your files on your computer with new batteries  first  the  do the above .


    the calculator will reset to the factory settings so you will have to reinstall everything except the operating system and what ever is on the eeprom


    best of luck  all is not lost  this machine is a real computer.


    oh this problem occured when I started to install assembly programs.


    I have since stopped this to my dispare but I am still interested in programming  with the language on the system.  It is very good.







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16 Answers

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Solution that worked for me, taken from "Ti-89 titanium wont turn off":
Best Solution posted on Mar 05, 2008 Guest
Rank: Apprentice
Rating: 0%, 0 votes
I was able to fix the problem nut it requires several steps and only offers a temporary fix (untill the calculator is reset then it needs to be done again).
1. Press F5, then Dimond (symbol on buttion) then "Clear"
2. Press "alpha" then "S"
3. Press "0" dont mess with anything else here
4. Press "2nd" then "Quit"
Now you can turn it off but are missing the bottom text (rad,auto, etc...) to fix
6. Press "Mode" change radian to degree then "enter"
Now the text is displayed showing the mode.
7. Set the mode back to radian by reversing step 6.
Thats it I dont know how to get the bottom line back though...

Posted on Aug 19, 2009

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I had the same problem. I clear the RAM, reset it and even reloaded the OS. Finally, based on advice from another website, I blew air into the I/O port on the top. It works now. Apparently dust can cause some sort of problem on the port. I then covered the port with electricians tape.

Posted on Aug 28, 2008

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I had the same problem where my TI-89 wouldn't turn off. I took out the back up memory and it still wound't turn off when I put it back in. However, I tried the same process two more times and I also blew into the I/O and USB ports and now it turns off. So my suggestion is to keep taking out the back up memory and the batteries and try blowing in the ports and see if that eventually helps.

Posted on Aug 28, 2008

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I bought mine (TI-89 Titanium) from an ebay seller, and I had this problem after a few months. I took all the batteries out (not the backup), and left them out for an hour or so. I also blew some air (something similar to compressed air) in the I/O port, and I can now turn my calculator off!

Posted on Jan 02, 2010

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I had the same problem on my TI 89 Titanium. This is how i solved it: 1) I driled out the six screws with a 2,5 mm dril.(be carefull) 2) Then i took the greenplate out. cleaned the housing, te buttens and the greenplate. put it back together. and it wase fixed!
So i think its not a softwareproblem but just a dirty inside.

Posted on Jan 05, 2011

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Just get a can of dust remover and clean the I/O & USB port on the top of it and it works. I just fixed one.

Posted on Apr 17, 2010

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I tried blowing in the I/0 port but it didn't work for me. So I used a small Allen wrench to scrape in the I/0 port and it did fix the problem. I had even called TI support and they couldn't help me (wanted me to exchanged one for $75). Thanks hope this helps those pissed off at their calculator.

Posted on Oct 28, 2008

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I think that with everything made in china - quality control is **** poor. I do not think that we get cheaper stuff. TI sure makes lot of money.<br /><br />Deserve quality stuff when you pay 150 bucks for a calculator<br />

Posted on Aug 22, 2010

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The problem goes trought the auto on funtion when you conect it the the computer, that's why it can be solve cleaning or scratching in the i/o port. The iphone had the same problem with the audio port stacked in handsfree mode.

Posted on Nov 03, 2013

  • Alejandro Torre
    Alejandro Torre Nov 03, 2013

    The problem goes trought the auto on funtion when you conect it the the computer, that's why it can be solve cleaning or scratching in the i/o port. The iphone had the same problem with the audio port stacked in handsfree mode.

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I can't believe it!!! i blew into the I/O and USB ports with my hairdryer :) and it worked, my TI is "turnoffable" again, after a year searching for the battery in my bag, again and again....
thanks for your comments!

Posted on Oct 20, 2008

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If you bought it straight out of the box, you can complain to Texas Instruments and they will send you a replacement. At first they'll fix your calculator but if that doesn't work they'll send a second brand new one. They keep track of the serial numbers of faulty calculators and wait for users to send them back. So get on it. Go Complain. Now

Posted on Aug 27, 2008

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I have the same problem w/ my TI-89 Titanium. I tried all those solutions: taking out the back-up battery, pushing <- -> 2nd and On buttons at the same time and reseting the RAM, but nothing! :( I wonder if the problem has to do w/ the on button or the Automatic Power Down feature in the calculator.

Posted on Aug 13, 2008

<- and -> and 2nd and on simultaneously.
Installation in progress

On ti-89ti hw4 os3.1

Posted on Aug 05, 2008

I had the same problem after I downloaded a tetris game to my ti-89 titanium. I tried to start the game, then a black band appeared at the top of the screen with the words "Divide by Zero" in the middle. The screen froze like that, pushing buttons could not turn it off, and even taking out the AAA batteries didnt help.

My solution was to actually take the backup battery out and put it back in, and eureka!!! Everything was back to normal. Now, I don't know any side effects, it may erase all of the memory or it may not, just remember my calc was brand new off the shelf. I couldn't find the tetris game on the calc afterwards, but I could find another folder that I had downloaded before tetris so.... use your own discretion. I really hope this helps people with the same problem, so if your willing to lose the memory instead of bringing it back, try taking out the backup battery.

Posted on Dec 26, 2007

I'm having the same problem, I bought this thing opened from staples and I see why the previous owner returned it. As soon as I'm done exams, I'll do the same

Posted on Dec 14, 2007

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I'm having the same problem and soon as I can i intend on clearing both the RAM memory (by taking out both the cell battery and the AAA's) and flashing the OS. It surely is based on a corrupt memory location probably at a very low address range. I'll post a solution when I do this!

Posted on Apr 12, 2008

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