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?
Re: Ti-83 Plus weird display problem (detail included)
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.
Re: Ti-83 Plus weird display problem (detail included)
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.
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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.
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.
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].
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.
doing statistics, you have to prepare the calculator by clearing old
data that may generate errors.
A. TO CLEAR OLD DATA
Press [2nd][ ] (MEM) to open the memory management
The command echoes on main screen, press [ENTER] to run
obtain the correlation coefficient in a statistical analysis on the
TI8xPlus family of calculators you must activate the DIAGNOSTICSON
option. To access the command
You press [2nd]  (CATALOG)
While the list of commands is displayed, press [X^-1]
Cursor jumps to first command that starts with D,
Press the DownArrow 9 times to reach DIAGNOSTICSON
Select it and press [ENTER]
Command echoes on main calculator screen with blinking
Press [ENTER] to set the option
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.
THE DATA Press [STAT][1:Edit] Type in your D (X ) values
and the N (Y) values in L2 (see picture 1). Sorry the picture does not
have YOUR values.
OBTAIN statistical RESULTS (optional)
After you finish entering the data, press [2nd][Quit]
to exit StatEditor.
Press [STAT] and highlight Menu (CALC)
In the list select [2:2-Var Stats]
Command echoes on main screen.
Press [ENTER] to calculate the stats
what one gets with the data above.
the Down Arrow next to n=7. That means the results screen has more
values. Press the Down Arrow to display.
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
is no arrow at the bottom of the picture. End of statistical results. The
captures with 2-Var Stats summarize all the statistics.
there is no correlation coefficient, no line of best fit, etc. To
obtain that you have To perform a regression analysis.
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
Press [STAT] , highlight [CALC]
In the list of regression models select [0:ExpReg]
The command ExpReg echoes on main calculator
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.
While ExpReg command is still in command line,
press the [VARS] key.
Highlight the [Y-VARS] menu and select [1:Function],
then press [ENTER].
In the Y function variable list select [1:Y1]
At the command line, you have ExpReg Y1.
Press [ENTER] to save the equation of best fit in Y1.
are your results. (These are your actual results)
also have r and its square.
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.
THE SCATTER PLOT AND BEST FIT CURVE ON SAME SCREEN
of the curve of best fit, you can draw a scatter plot as follows.
Press [2nd][Y=] (STATPLOT)
Select [1:Plot1...Off] and press ENTER to open plot1
Use arrow to highlight On and press ENTER
Use the Down Arrow to move cursor to the line Type.
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.
is the configuration screen
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
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.
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.
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
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
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][=] .
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
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