Question about Texas Instruments TI-84 Plus Calculator

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When i press the y= button, it says invalid but wont let me press goto, if i press quit it goes to undefined and if i press goto then, it tells me an equation

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Some old configuration settings interfer with the program. Clear ram
Press [2nd][MEM][7:Reset][1:All ram][2:Reset] [ENTER] then [CLEAR] the screen and start entering you function.
Hope it helps.

Posted on Sep 28, 2009


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Posted on Jan 02, 2017


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How to re-program remote clu577tsi hitachi tv

Direct Code Entry
  1. Press and hold the SETUP button until the red indicator stays on, then release the SETUP button.
  2. Press and release the desired Mode button (TV, VCR, etc.). The red indicator blinks, then stays lit.
  3. Enter the 4 digit code from the code tables. Note: after a valid code entry, the red indicator turns off. For an invalid code, the red indicator flashes.
  4. With your device on, press CHANNEL UP. If the device responds, no further programming is required. Note: If some buttons do not operate your device, try one of the other codes for your brand

Apr 03, 2012 | Hitachi Clu-577tsi Remote Control


How to use the set command as a substitute for the choice command in W2K an XP

The choice command from Win95 can't be used in WinXP or W2K you need to use the SET CHOICE = and the IF'%CHOICE%'== command here is the same example for Win95 example with the CHOICE and ERRORLEVEL commands.

Example One: (Win95)

In the below example a user would be prompted to enter an option of y,n, or Q to print you have selected YES , NO, or QUIT.

CHOICE /N /C:ynQ Select (y,n or Q)? %1

To add more choices increase the errorlevel number and append to the ynQ on the choice command

Example 2: (WinXP and W2K)

In the below example a user would be prompted to enter an option of y,n, or Q to print you have selected YES , NO, or QUIT.

@echo off
set choice=
set /p choice=Type (y,n or Q)?
if not '%choice%'=='' set choice=%choice:~0,1%
if '%choice%'=='y' goto yes
if '%choice%'=='n' goto no
if '%choice%'=='Q' goto quit
echo "%choice%" is not valid please try again
goto start
echo you have selected YES
goto end
echo you have selected NO
goto end
echo you have selected QUIT
goto end

To add more options simply add another if '%choice%'== goto line and give it a name and add the colon to the front of the name.

Hope this helps took me a whole night to work it out for Windows XP I like the way it works its much easier to understand when you don't have to use the ERRORLEVEL.

N.B> I have used 3 options Y,N or Q you don't have to and the choice I have kept simple you can copy this code and add your own replace the (you have selected YES) with whatever you require to happen if the user presses Y.

on Dec 02, 2009 | Computers & Internet

1 Answer

Error: Invalid

You're probably trying to graph a function that does not involve stat plot features. You can correct this by turning off the stat plot features. Press "2ND" "STAT PLOT" and then select 4:PlotsOff.

Mar 27, 2012 | Texas Instruments TI-84 Plus Calculator

1 Answer

When i push the intercom then message button to retrieve messages it tells me invalid across the screen

while the handset is hung up (without pressing the intercom button) press the "MESSAGE" button, on the display it should show ~why~ the message light is on (cause it is possible someone tried to intercom you, then hit the wrong button) after that you can turn off your light by pressing:
2) 700
3) *your extension #*

it is possible that the extension that turned on your message light is no longer in service, making it an invalid extension

Jan 06, 2011 | Panasonic KX-T7431 Corded Phone

1 Answer

I transferred a program into the calculator using the TI Connect software but when i go to the program in the calculator it says "undefined." I tried transferring the program from another calculator to...

A program, or an Application are both programs, but the former will be accessed through the program manager [PRGM] and the latter through application manager .[APPS] .If it is a program (in the context of the TI84Plus) you press [PRGM]. You see three menus [Exec [Edit] [New]. If there are any programs in the calculator, you should see them under [Exec] and under [Edit].

A. To RUN a program
  1. To run a program already in calculator, you select its name under the [EXEC] menu and press [ENTER]. If you get an error message "undefined" it is most certainly due a variable or parameter used in the program without its being defined first.
  2. This is programming error that must be corrected by editing the program.
  3. Usually you get a QUIT or GOTO in the error message.
  4. Press the number corresponding to GOTO and the cursor will be at the place where the error occurs
  5. If a program is archived (it has an asterisk in front of it name) you cannot run it. It must be unarchived first.
B. To edit a program
  1. To edit a program already in calculator, you select its name under the [EDIT] menu and press [ENTER].
  2. If you are allowed to edit it, you will be able to enter, delete and modify commands.
  3. To do so, you must know the programming language of the TI84Plus.
  4. If a program is archived (it has an asterisk in front of it name) you cannot edit. It must be unarchived first.
Hope it helps.
Thank you for rating this solution.

Dec 11, 2009 | Texas Instruments TI-84 Plus Silver...

2 Answers

It starts with the lenovo screen and then goes to the Windows XP screen but it goes back to the Lenovo screen. What can I do so I wont have to restore my system again?

ok, press f8 key as the system is booting up, this will put you in safe mode,

if the system boots okay goto command prompt mode and type chkdsk /r to repair any files etc ,

Try booting up again, if the problem is the same then it a startup file that need repairing so goto safe mode, command prompt type bootcfg etc and try repairting it that way, us e the help command to point you in the right direction.


Oct 01, 2009 | Lenovo 3000 C200 Notebook

1 Answer

I get the error message ERR: INVALID DIM with

If you are in the stat mode and entering points in list 1 and list 2, it could be that one list is longer than the other.

If you are just trying to graph from the y= screen, one of your plots is probably turned on. The easiest way to fix this is to press the 2nd button the the plus button, then 7 and then 1 and then 2. This will reset to factory settings.

Jul 24, 2009 | Texas Instruments TI-83 Plus Calculator

2 Answers

My Graphing calculator has no x or y axis. Its all Blank.

Press the 2nd Button then the ZOOM button. Make sure that AxesOn is highlighted. If not, move your cursor down until you on AxesOn and press ENTER.

If AxesOn is highlighted, then it is probably your window. Press ZOOM, then 6.

Jun 03, 2009 | Texas Instruments TI-84 Plus Calculator

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