I had loaded some tgv files and was using it during a test. Suddenly, while using the equation editor it jammed and then it turned off and never turned on again. When batteries are on, you can notice some activity on the LCD display, but nothing interesting. I tried resetting it and tried taking all batteries off to see if it went back to but nothing happened as well. What should I do? Thank you in advance, Bruno

Re: My HP won't turn on anymore

I just fixed two "failure to power on" 49g+'s. For the first one I did a moderate slap of the unit against my thigh and then tried a reset (I thought maybe the reset was jammed with some debris) - it worked! The second one just needed me to scrape off some corrosion (an old toothbrush works) from the battery terminals - AJ

Posted on Feb 08, 2008

Re: My HP won't turn on anymore

Try a cold start, reseting the calculator, introducing an wire in the back small oriffice in the calculator. It may fix the problem.

JC

Posted on Nov 05, 2007

Just open the Y= equation editor and enter your equation. Use X for T. Make sure the angle unit is in radians.

Nov 10, 2014 | Texas Instruments TI-89 Calculator

I hear you. The problem is that there a lot of facts and algorithms to remember (approximately) and a human memory is limited. Why bother spend half an hour doing what a calculator can do in a fraction of a second. Personal prowess is a nice thing for show, but if one has to be efficient, a powerful HP calculator is more appropriated than a genius with the Japanese abacus.

Sep 27, 2014 | Calculators

You have to use **Y Editor** to define functions on the both sides of the equation and then graph it. Finally option is **F5: Intersection**.

See captured images for equation**5x+10=-2x-7**, **y1=5x+10**, **y2=-2x-7** and **x=-17/7**

See captured images for equation

Feb 25, 2012 | Texas Instruments TI-89 Calculator

You do not say if you get any error message.

Try to reset the calculator Press [2nd][+] to open memory management.

Press [7][RESET] followed by [1:All RAM] [2:Reset]

Then open the Y= editor and to the right of Y1= type in [X,T,theta,n] and press [ENTER]. You will see the straight line y=x.

Please report back what you get.

Try to reset the calculator Press [2nd][+] to open memory management.

Press [7][RESET] followed by [1:All RAM] [2:Reset]

Then open the Y= editor and to the right of Y1= type in [X,T,theta,n] and press [ENTER]. You will see the straight line y=x.

Please report back what you get.

Aug 02, 2011 | Texas Instruments TI-84 Plus Calculator

In the Y= editor, scroll down to the equation in question. Press left-arrow until the cursor goes over the symbol. Press ENTER repeatedly to cycle through the various graphing options.

Jun 24, 2010 | Texas Instruments TI-84 Plus Silver...

You have activated the Transfrm Application and you must kick it out of memory.

- Press [APPS].
- Use the arrow key to scroll up pr down to point to Transfrm.
- Select it and press [ENTER]
- Select [1:Uninstal] and press [ENTER]
- Open the [Y=] function editor to enter your functions and then
- press [GRAPH] to have them drawn.

Apr 16, 2010 | Texas Instruments TI-84 Plus Calculator

Here is an asurd example of a piecewise function

Y1=11 for X less than 10

Y1=3 for X in the range [10, 20[

Y1=X+5 for X in the range [20, 30[

Y1=10 for X larger than 30

Here is the screen capture of the Y= editor window.

You have

Y1=11 for X less than 10

Y1=3 for X in the range [10, 20[

Y1=X+5 for X in the range [20, 30[

Y1=10 for X larger than 30

Here is the screen capture of the Y= editor window.

You have

- the definition of the function within a domain, enclosed in () followed by the domain enclosed in ()
- a + to introduce the second piece (definition) (domain)
- + a third piece (definition ) (domain)
- and so on.
- Use the [2nd][TEST] key sequence to access the relational operators, less than, greater than, etc.

Mar 09, 2010 | Texas Instruments TI-84 Plus Calculator

Press the Y= key to invoke the Y= editor. Enter in your equation.

Press the WINDOW key to set the window parameters.

Press the GRAPH key to have the calculator graph the equation.

For more details and options, see the "Function Graphing" chapter in the Guidebook.

Press the WINDOW key to set the window parameters.

Press the GRAPH key to have the calculator graph the equation.

For more details and options, see the "Function Graphing" chapter in the Guidebook.

Nov 11, 2009 | Calculators

Go to Window and make sure there are acceptable values for your graph, default is usually 10 and -10 with 1 scale.

Jul 06, 2009 | Texas Instruments TI-83 Plus Calculator

download it again cos the stat/list editor is a app, its not permanantly stuck there. it can be downloaded from the TI website

Feb 22, 2008 | Texas Instruments TI-89 Calculator

848 people viewed this question

Usually answered in minutes!

The unit was in my desk for some ime, and I guess the batteries died. I replaced both the backup and the AAA's. I removed the memory card. Reset does not work. No USB connect.

×