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.
Solution that worked for me, taken from "Ti-89 titanium wont turn off":
Best Solution
posted on Mar 05, 2008
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Rank: Apprentice
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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
I keep getting error: Domain error
whenever i try to do any base conversions
on my TI-89 titanium and I don't know why exactly
e.g. "1000>hex" (goto math and base and hex) then enter and it says i have a domain error
Not sure if TI-89 mode keys are the same, but here's the solution for that calculator:
1. Hit the mode key
2. Hit F3 to get tot Exact/Approx (might be different for 89T).
3. Set it to Exact.
4. Take a look at T-89 manual pages 327, 328, 329.
Nice of TI to NOT include that in the manual, huh?
Posted on Jan 26, 2008
I haven't used my TI-89 Titanium for about 2 years. I just tried to turn it on, and it won't turn on. I have replaced all the batteries. What do I do?
Please don't get your hopes up, but perhaps something in the following few suggestions will work:
For the TI-89 Family, TI-92 Family, and Voyage™ 200:
To reinstall the Calculator's operating system, take a look at the following TI site.
On the TI-92 family or Voyage 200, hold the [2nd] key and the [hand] key, then press and release the [on] key. On the TI-89 family, press and hold the [2nd] key, left arrow, and right arrow; then press and release the [on] key. This should reinitialize the operating system, in which you should see a progress bar filling on the screen.
http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetNumber=12089
I would hunt around on the TI knowledge base to see if there are some more useful suggestions if nothing above works. If I find any more info that could be useful I will post it.
Posted on Jan 30, 2009
For example, it will not let me graph equations such as y=x and y=3x+3. Anything with a variable does not work.
You have to reset
• Press [2nd] [6] (MEM) [F1] [ENTER(RAM)]
• Select 1:ALL RAM
• Press [ENTER]
• Press [ENTER]
NOTE- erased half of my programs(I think only the ones in the main directory)
Posted on Sep 05, 2009
Hi
When I type numbers in list 1 and list 2 and try regression, I get "Domain Error" message. Can you help me with this?
Kindly regards Jeppe
I had the same problem, this worked for me:
Mode -> page 2 -> Exact/Approx change from "Exact" -> "Auto"
Posted on Aug 28, 2008
When ever I try doing limits or differentiate the error code comes you "too few arguments". Any suggestions on what i am doing wrong???
the problem is you haven't given it anything to solve...
always add a comma and the variable after any solve, differentiate or intergrate problem...
eg:
solve(x^2=4) is wrong!
intead put:
solve(x^2=4, x)
Hope this helps
Posted on Nov 06, 2008
I'm trying to graph e^xyz.
or if I could just do a function with x and y that would awesome.
Hello,
First you must configure your calculator to perform 3D graphics
Press MODE
1.The first line shown is Graph. Unfold the hidden menu list with the right arrow and choose Graph 5:3D
2. Press ENTER to validate.
Now you must define the surface you want to draw
1. Press the [diamond] key then [Y=] to get a list of function names, the first of wich is z1
2. Enter the following function (or your own) z1=(x^3*y-y^3*x)/390
( x cubed times y -y cubed times x) divided by 390.
3 Press ENTER.
Graph the function
Press the [diamond] key then [GRAPH]
The graphing screen displays progess in %. When it is finished you will see a weird sombrero.
Hope it helps
Posted on Aug 22, 2009
do you down load this program?
No you don't have to download a interpolations program, you can enter it in as a function like this:
:dp(xx1,yy1,xx2,yy2,x)
:Func
:yy1+(yy2-yy1)*((x-xx1) / (xx2-xx1))
:EndFunc
How I do it is, I put it in a folder dc so, you create a folder name dc
2nd key then - key which will be the VAR-LINK key
hit F1 key then the 5 key to create a new folder. Type in what you want to call your folder in my case dc and hit enter.
Next,
Hit APPS key then 7 key then the 3 key, then you see the word program highlighted open it up and change to Function hit enter.
Then slide down to your new folder you just created in my case dc, once you find it highlight it and hit enter.
Next,
slide down to variable and type dc and hit enter.
Next, type in or make it look like this:
:dp(xx1,yy1,xx2,yy2,x)
:Func
:yy1+(yy2-yy1)*((x_xx1)/(xx2-xx1))
:EndFunc
Now when I'm at the home screen in the main folder, I type:
dc\dp(0,0,5,100,2)
And I get 40 for my answer.
Here's my logic:
0,0 is the starting point, let's say my circuit max voltage is 5 volts and my max resistance is 100 ohms. I want to interpolate or know how many ohms I would have if my circuit measured 2 volts, which is 40 ohms.
Now if I had ohms and wanted volts I just set it up like this:
dc\dp(0,0,100,5,40)
which equals 2 volts
i hopethis helps you. raklein62
Posted on Sep 01, 2009
how do you find the domain and range using a TI-89 calculator
Absolutely! Here's how:
-Make sure the function is in the form f(x)=.... (treated as y=...)
-Then, go to "y=" on your calc
-Plug in your equation (using x as your other variable regardless of whatever your book/worksheet uses)
-Hit "graph"
-For Domain, look at possible limitations on x values (does it stop at 3 no matter what? are there no limitations? etc)
-For Range, look at limitations on y values
Hope that helps! :-)
Posted on Sep 22, 2009
my answers only come up in decimals but i want to get them in fraction form...what do i need to change?
Here is what you do:
1) Press the Mode button.
2) Scroll down the list that appears until you find "Exact/Approx".
3) Change the setting for "Exact/Approx" to Exact.
4) Press enter to save the settings change.
You have three possible settings for "Exact/Approx":
1) Auto - The calculator will try to determine the best format.
2) Exact - The calculator will always give the answer in fraction form.
3) Approximate - The calculator will always give the answer in decimal form.
Posted on Nov 16, 2009
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