My TI -89 won`t turn off

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...

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.

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.

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!

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.

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.

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.

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 />

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.

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!

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

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.

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

On ti-89ti hw4 os3.1

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.

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

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!