Question about Texas Instruments TI-83 Plus Calculator

4 Answers

Ti-83 Plus weird display problem (detail included)

Whenever the screen is full and a line with calculation result comes up at the bottom of the screen, the screen all of a sudden shows things in a weird way and can't be read. By press "2nd+mode"(=quit), it gets back to normal. but this pattern repeats forever. Every time screen is full, and a new line comes up at the botton of the screen, the weird display problem repeats. Does anybody can help me?

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  • james lxglobus Jun 05, 2007

    no, it doesn't have a hole.

  • Anonymous Feb 19, 2008

    I have exactly the same problem. I've installed the latest OS and even called Texas Instruments. They tried everything they knew of and couldn't get it fixed. I guess we either have to deal with it or buy a new calculator.



    Sorry.

  • Jacksta Mar 12, 2008

    YEAH I ALSO HAVE THIS PROBLEM!! ANYONE KNOW HOW TO FIX IT?!

  • brunowilson May 26, 2008

    i have the same problem there is some vertical lines that come up everywhere .... when graphing when doing normal calculation and everything... i try to reset all thinking that that was the problem ... it didnt fix it ... then magically after a while it was back to normal ... and now the day before a math test the calculator went nuts again...

  • Anonymous Oct 16, 2008

    sounds like mine, i tried reseting to the factory defaults, and that did not change the problem. only really happens when i hit the last lines of the screen. and in menus where there are words all over the page, there is strange distortion all over the page.

  • Anonymous May 08, 2009

    no, nothing has worked and i realllyy don't want a new calculator!!! what can i do???? columns on my screen (5th and 3rd-to-last) don't even work, and random vertical lines appear!!! is there some way to fix this? :'(

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4 Answers

sandovalxoch
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Warning the following tip will erase apps and programs from calculator!
The following will run the self-test mode
Press mode then press alpha then press s then press enter
If you want to get out of the self test press the on button in case you want to attempt to save/transfer apps, programs, variables etc.
The calculator will start to test itself it'll countdown and display numbers on the screen. It can get better sometimes other times a replacement of both the cr1616/cr1620 lithium battery and the 4 AAAA batteries work. Also ensure that you've attempted to clear out all the memory and reset the calculator. To delete all variables, tables, graphs, etc: Press 2nd button then press MEM then press 2 then press 1.
To reset the calculator press 2nd button then press MEM then press 7 then press the left arrow then press 1 then press 2.

Posted on Feb 14, 2012

  • saythanks111
    saythanks111 Jan 26, 2014

    Thanks, helped me

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I had the same problem for a long time, I just let it sit there without the batteries for a while (a few weeks) and then plugged the batteries back in, hit 2nd+MODE(Quit) and it worked just fine after that. Also try to take out the little battery in the back, the memory battery, maybe that will fix it. Good luck.

Posted on Jun 13, 2008

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Complete memory reset. it worked for me.

Posted on Jun 01, 2009

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Is there a tiny hole in the unit to push in a pin to reset it?

Posted on Jun 04, 2007

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1 Answer

I have a TI-86, whenever i input - it shows Ans- and then it show that is an error. how can i fix it.
The - key is for subtraction, an operation that needs two numbers. If you press - as the first key on a line, the calculator assumes you want to subtract something from the previous answer, Ans.

If you want to enter a negative number, use the (-) key on the bottom row of the keyboard, just to the left of the Enter key.

Apr 05, 2016 | Texas Instruments TI-86 Calculator

1 Answer

Logs
Are you specifying a base? If you don't specify a base the calculator will default to 10, and thus you get exactly the same thing as using the log key.

May 15, 2013 | Casio FX83ES Scientific Calculator

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There's a blank bar that runs horizontal in the middle of my TI-84 plus that's about 16 pixels wide(high?). It's the same color as when the device is turned off. I've tried a memory reset and no results....
SPLIT SCREEN.

It sounds as if you might have split screen mode on. I've got a TI-83 as well as a TI-89 Titanium, both offer a split screen mode. The latter allows for choosing which applications are displayed on each half screen. I am presuming that you may have accidentally put your TI-84 in this mode.

So, if it is a split screen deal then all you have to do is go to the mode screen, find the option for switching from split screen to full screen, and switch it back to full.

I hope that helps. Give us your results!

Adios

Mar 11, 2011 | Texas Instruments TI-84 Plus Silver...

1 Answer

It will not solve for area using pie key. It shows what I just typed in the window
To convert a symbolic result to numeric, press diamond then ENTER. To have all results come out in numeric form, press MODE to bring up the mode screen, press F2 to go to page 2, use the arrow keys to move to the Exact/Approx line, press right-arrow, select Approximate. Press ENTER to save the change and exit the mode screen.

Feb 24, 2011 | Texas Instruments TI-89 Calculator

1 Answer

Whenever i enter coordinates for a scatter plot or best fit line the point do not show up neither does the line i can trace the points and the calculator tell the coordinates but they are not visible
Two possibilities:
  1. Graph is out of range (out of the window). If your data is positive set Xmin=0 and Ymin=0. Set Xmax a bit larger than the maximum x-value and YMAX a bit larger than the maximum y-value. You can also press [ZOOM] and select [9:ZoomStat].
  2. To mark the points you may have select the dot and your calculator screen is too dim.
To help you setup your calculator To perform regression analysis I am inserting here a copy of a more detailed post of mine where I show the complete procedure applied to a quadratic regression.

Before doing statistics, you have to prepare the calculator by clearing old data that may generate errors.

A. TO CLEAR OLD DATA
  1. Press [2nd][ ] (MEM) to open the memory management screen.
  2. Press [4:ClrAllLists]
  3. The command echoes on main screen, press [ENTER] to run it.
  4. Calculator displays Done.
B. RUN the SETUP EDITOR Command
  1. Press [STAT][5:SetUpEditor] [ENTER] ; calculator displays Done.
C. TURN DIAGNOSTICSON option (optional)

To obtain the correlation coefficient in a statistical analysis on the TI8xPlus family of calculators you must activate the DIAGNOSTICSON option. To access the command
  1. You press [2nd] [0] (CATALOG)
  2. While the list of commands is displayed, press [X^-1] (D)
  3. Cursor jumps to first command that starts with D, dayOfWk(
  4. Press the DownArrow 9 times to reach DIAGNOSTICSON
  5. Select it and press [ENTER]
  6. Command echoes on main calculator screen with blinking cursor
  7. Press [ENTER] to set the option
  8. Calculator displays Done.
From now on, if a correlation coefficient has meaning for a regression model, it will be calculated along with the other statistical results. If it has no meaning to the model it will not be calculated.

D. ENTER THE DATA
Press [STAT][1:Edit]
Type in your D (X ) values in L1 and the N (Y) values in L2 (see picture 1). Sorry the picture does not have YOUR values.
894afd6.jpg

TO OBTAIN statistical RESULTS (optional)
  1. After you finish entering the data, press [2nd][Quit] to exit StatEditor.
  2. Press [STAT] and highlight Menu (CALC)
  3. In the list select [2:2-Var Stats]
  4. Command echoes on main screen.
  5. Press [ENTER] to calculate the stats
Here is what one gets with the data above.

f2d3743.jpg
Notice the Down Arrow next to n=7. That means the results screen has more values. Press the Down Arrow to display.
ab847d7.jpg
You notice that the n=7 line now has an arrow pointing Up. Notice the Down Arrow on the bottom line (more data is coming). Here is the rest of the statistical results.
37fb2ba.jpg
There is no arrow at the bottom of the picture. End of statistical results.
The screen captures with 2-Var Stats summarize all the statistics.

However there is no correlation coefficient, no line of best fit, etc. To obtain that you have To perform a regression analysis.

E. PERFORM A REGRESSION ANALYSIS
To perform a regression analysis, you must try several regression models and then find the one that mimics the raw data best. Select Regression model ( exponential, linear, sine, quadratic, etc.) Here I selected Exponential
  1. Press [STAT] , highlight [CALC]
  2. In the list of regression models select [0:ExpReg]
  3. The command ExpReg echoes on main calculator screen.
  4. If you press [ENTER], you'll get your equation but you will not be able to draw the curve on top of your data to verify the goodness (no it is not a swear word) of the fit. So you must save the equation as a function in Y1 variable.
  5. While ExpReg command is still in command line, press the [VARS] key.
  6. Highlight the [Y-VARS] menu and select [1:Function], then press [ENTER].
  7. In the Y function variable list select [1:Y1]
  8. At the command line, you have ExpReg Y1.
  9. Press [ENTER] to save the equation of best fit in Y1.
Here are your results. (These are your actual results)
f07d40f.jpg
You also have r and its square.

Since the equation is saved in the Y1 function it can be superposed on the scatter plot. You just have to press GRAPH and it will be drawn. But that will not tell how good the fit is, until you see the function drawn on top of the raw data.

F. DRAWING THE SCATTER PLOT AND BEST FIT CURVE ON SAME SCREEN

Regardless of the curve of best fit, you can draw a scatter plot as follows.
  1. Press [2nd][Y=] (STATPLOT)
  2. Select [1:Plot1...Off] and press ENTER to open plot1 configuration screen
  3. Use arrow to highlight On and press ENTER
  4. Use the Down Arrow to move cursor to the line Type.
  5. Select the first icon for a scatter plot. NOTE: To navigate the 6 statistical stat plots on the line Type, use the right or left arrow (to backtrack), but not the Up or down arrows.
Here is the configuration screen
b3dea28.jpg
Here plot1 is active (ON), it is scatter plot (first icon) the XLIST is L1 by default but you can change it to some other list. Notice the highlighted A cursor on XLIST line. It means that the [ALPHA] keyboard is active.
On the line Mark you can choose the appearance of the raw data point.

And here are your two graphs: the raw data scatter plot and the line of best fit on the same screen. On the picture the ZoomStat option was used.
d6e8e98.jpg
The graph above represents a parabola and has nothing to do with the sample data entered. But it shows the raw data and the curve of best fit on the same screen.

Sep 03, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

Turned on ti 86 and have a black screen. I have replaced all of the batteries and still is black.
Whenever the screen is full and a line with calculation result comes up at the bottom of the screen, the screen all of a sudden shows things in a weird way and can't be read. By press "2nd+mode"(=quit), or try reset button (a small hole which a pin can only be used to press it to RESET. Gud Luck

Aug 25, 2010 | Texas Instruments TI-86 Calculator

1 Answer

Whenever i do a large sum, for example 102795/600,...
Let us first set the record straight: Your calculation is a division not an addition. Be it as it may, the result you obtain is correct the fraction is equivalent to the one you entered, the difference lie in the fact that the calculator reduces the (entered) fraction to its simplest form.
Both the numerator and the denomonator have been divided by 15.

If the result is already calculated and displayed, press the [S<=>D] key It will convert a fraction or radical to decimal. This is always possible. If the result is decimal it may be converted to a fraction or a radical (Not always possible).

If the expression to be evaluated is still in the command line and you have not pressed the [=] key, you can force the result to be displayed in decimal format by pressing [SHIFT][=] instead of just [=].

More permanently. If you do n o care for fractions and radicals, set the Input/Outpout mode to LineIO. To do do press [SHIFT][MODE] to access the (SETUP) screen and select [2:LineIO]

May 21, 2010 | Casio fx-300ES Calculator

1 Answer

Changing how the result is displayed
The calculator has two input/output (I/O) modes: MthIO and LineIO.
MthIO is a very nice novelty: it allows one to enter expressions as with pen and paper (textbook display). Results are displayed, whenever possible, as exact values ie fractions and radicals.
MthIO is the default I/O mode of the calculator. If it is not set, you can set it by pressing [SHIFT][MODE] (SetUp) to access a list of choices. Select [1:MthIO].

The other I/O mode is the old way of doing things: every thing is enter on the same level line, while in MthIO you have textbook style templates. In LineI/O all results are displayed as decimal (approximate) values.

To set LineIO press [SHIFT][MODE](SetUp) and select [2:LineIO].

If the displyed result is fresh you can toggle between decimals and fractions/radicals by pressing the [S<=>D] key.
Even if you are in MthIO you can force the (final) result into decimal display format by pressing, NOT the = sign, but [SHIFT][=] .


Jan 20, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Time problems
Sorry to say it but the DMS key is to convert between Degrees, minutes, seconds and decimal degrees (angle units). This cleared here is how to use the DMS key on this calculator.

Label of key [deg symbol ' "]. It is between [(-)] and [hyp]

To enter a value in decimal degrees
12.58 [deg ' "] [=] Screen displays 12.58 deg on top line and 12 deg 34' 48" on bottom line.
Pressing the [deg ' "] key while this value is displayed will show 12.58

To enter a DMS value:

Press the [deg ' "] key after each number even if one of the numbers D,M,S is nill (0).
Exemple Enter 25 deg 0 ' 48"
25 [deg ' "] 0 [deg ' "] 48 [deg ' "] [=]
Screen displays 25 deg 0' 48" on bottom line
Pressing the [deg ' "] key converts this result to decimal degrees 25.013

Jan 14, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Lines on the screen goeing through the #'s making it hard to read
Hello,
Since I do not see the kind of screen you have, I surmise (maybe wrongly) that the split screen is activated.
Press [MODE]. Use [DownArrow] to scroll to where is says Full Horiz G-T. Highlight FULL and [ENTER] Then [2nd][QUIT].

If that does not solve the problem
[2nd][MEM] [7:Reset][2:defaults][2:Reset]

Hope it helps.

Sep 07, 2009 | Texas Instruments TI-83 Plus Calculator

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