TI 89- 108
TI-89 TroubleShooting Guide
Copyright © Houghton Mifflin Company. All rights reserved.
the desired function location and return to the data/matrix editor to repeat the regression instruction.
If you still obtain an error message, check the graph format as described on page 1 of this Guide.
•
While trying to draw the graph of an equation that I entered in the Y= list, I get a DIMEN-
SION MISMATCH error. What do I do?
The TI-89 will sometimes not draw the graph of a function when one of the scatter plots is turned
on. To correct this problem, press
ESC green diamond Y=
, put the cursor on any plots that are
checked, and press
F4 [
b
]
to turn the plots off. The graph should now draw.
•
What causes an error message about the window and how do I eliminate this error?
This error message is usually caused when
Ymin = Ymax
in the
WINDOW
settings. The code in a
program may be such that the height of the window (
Ymin
−
Ymax
) is set to zero. If you attempt to
draw a scatter plot when the output is constant, this error results because the TI-89 uses the output
data to set the range for the
WINDOW
. To correct this error, manually set
Ymin
and
Ymax
and
press
green diamond GRAPH
to draw the graph.
•
The data that is graphed is not the correct data. What happened?
Make sure that you have the correct folder and the correct data in the data/matrix editor. All
instructions in this Guide are to enter data in the variable
calcc
in the
Main
folder. Go to the
Y=
screen and be sure that the plot that is turned on is defined using
c1
and
c2
in the
Main
folder.
PROGRAMS
•
Where can I get the programs that are used in this Guide?
The programs can be transferred to your calculator from another student or your teacher’s calcu-
lator and a link chord. If no one has the programs, they can be downloaded from the web site for
this text accessible through
college.hmco.com.
A TI Graph-Link
cable and the linking software for your particular calculator are needed to
transfer the programs from the Internet to a computer. A special cable is needed to transfer the
programs from the computer to your calculator. The linking software is free at the TI web site
accessible through
w w w .ti.com
and at the web site for this text. If you cannot find a cable, ask at
the learning center for your school, check with your instructor, or search the TI web site for
instructions on how to purchase one.
•
Why won’t a program run, or why do I get an error when I try to run a program?
You may have unknowingly deleted or altered one or more lines of the program code. The easiest
method of fixing the problem is to use the link chord to re-transfer the entire program into the
calculator. If this is not possible, you can find the correct program code in the TI-89 Program
Appendix at the Calculus Concepts Website. Press
APPS 7 [ Program Editor] 2 [ Open] dow n
arrow
twice and then
right arrow
. Highlight the name of the corrupt program and press
ENTER
.
Compare the code in your calculator with what is printed in the TI-89 Program Appendix until you
find the error and correct it by retyping the correct code. Consult the TI-89 Guidebook that came
with your calculator for the location of the symbols in the program code.
•
Program NUMTGL keeps giving an error when I try to run it. What can I do?
Delete all functions from the
Y=
list (except the function in
y1
) before using the program named
NUMTGL.
This program uses many different memory locations in the calculator. If you receive
an error while running this program, you may have a picture, another program, or something else
stored as a single-letter name. For instance, if program
NUMTGL
is trying to store a number in
memory location
T
and you have a program called
T
, the calculator stops and may give an error
message. Delete or rename any programs, pictures, or whatever you have called by a single-letter
