Question about Texas Instruments TI-89 Calculator

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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!

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  • kakima Sep 28, 2010

    Hold the 2ND, left-arrow, and right-arrow keys, then press and release the ON key. Does that do anything?

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

Posted on Mar 29, 2011

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TI-89 Titanium screen frozen at apps menu


Remove the small memory battery, and then remove one of the four AAA batteries, then while holding down the APPS button reinstall the AAA battery and then it should say waiting to recieve operating system then hook it up to your computer with the silver connect cable and then on the computer send the operating system to the TI89 Titanium, and wait for it to install completely and it should work.

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Hi This problem can be fixed
ecrdn@yahoo.com

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Without performing a hard reset, you can avoid implied multiplication and insert a multiplication sign (*) between a variable and a function. For example if you enter xsin(x) you must insert the multiplication sign (*) and write x*sin(x), otherwise the calculator will assume that xsin( is a function. It will look for it and not finding it, will send an error message. Similarly, if you want to enter x times y or some othervariable, you must insert the multiplication sign, x*y

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It's "frozen". won't change from the screen its


Try to reset it by taking out the batteries and leaving to sit for a minute or so, if that doesn't work take out the small battery as well and leave it sit, if you're still stuck you can call ti-cares (800-842-2737) they're generally very helpful.

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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.

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1 Answer

My ti89 is jammed i can close it and open it but it stills comes up the same. Even if i take out the batteries and put it back it is frozen. How can you reset it of fix this?


You can try a hard reset if you're willing to have all your RAM cleared.

With the calculator off, press and hold the 2ND, left-arrow, and right-arrow keys, then press and release the ON key.

Feb 17, 2010 | 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.

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when i hit 2nd+left+right+on then i saw 'installation in progress' on skin. what i have to do? please help me.

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