Texas Instruments TI-89VSC Troubleshooting Guide - Page 3

TI 89-108 TI-89 TroubleShooting Guide 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 DIMENSION 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 b on. To correct this problem, press ESC green diamond Y= , put the cursor on any plots that are checked, and press F4 [ ] 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 calculator 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 www.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 Copyright © Houghton Mifflin Company. All rights reserved.