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LR1 how do i erase the LR1 off the screen?

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U get a new one it means its broken

Posted on Oct 28, 2008

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We have a TI-89 and it is froze on the home page. we tried holding the 2nd button , left arrow , rigth arrow and pressing the on button. it comes up with installation in progress , but when that is done it...


Here is a procedure to reset the TI-89 to factory settings (found online):

  • Press the "Snd Mem" key to display the memory screen.
  • Press the "F1" key.
  • Press the navigation key to select the "RAM" icon, then select "1: All RAM" to erase all data and programs from the random access memory and press the "Enter" key, or select "2: Default" and press the "Enter" key to reset all system variables to original factory settings. This preserves any user-defined variables, functions and folders.
  • Press the navigation key to select the "Flash ROM" icon, then select "1: Archive" and press the "Enter" key to erase all data and programs from the read-only memory or select "2: Flash Apps," then press the "Enter" key to erase all applications from the Flash ROM. Select the "All Memory" icon and press the "Enter" key to erase all data, programs and flash applications from the RAM and Flash ROM.

  • Hope this helps.

    Aug 21, 2011 | Texas Instruments TI-89 Calculator

    1 Answer

    How do I get rid of the border on the screen of the TI 84?

    First try the screen formatting (2nd, zoom) and reset the axis (select the option turn them off and then turn them back on again)

    If that doesn't work try clearing out the memory (2nd, "+", "7", "1", "2")
    Unfortunately this will erase everything on the calculator

    May 30, 2011 | Texas Instruments TI-84 Plus Calculator

    1 Answer

    My HP 48GX just displays a black (all pixel) display screen with one vertical stripe down the middle. I tried reset button and now it displays 2 vertical stripes (the new one divides the right half in...

    I just had this exact problem so I reset the memory as instructed below. Know I am back in business. Memory reset A memory reset will return the HP 48 to its factory-default state, which will erase all stored user memory. Use this feature very carefully.
    1. If necessary, turn the calculator on.
    2. Press and hold the ON+A+F keys simultaneously.
    3. Release all three keys at the same time. This should cause the calculator to display the message "Try to recover memory?"
    4. Press the A key to attempt to recover memory or the F key to erase the user memory. When A is pressed, occasionally the objects in memory are recovered in new sub-directories of HOME labeled D.01, D.02, et cetera, although there is no guarantee that all of the variables will be recovered. Pressing the F key will cause all information stored by the user to be erased from calculator memory. This will also affect any RAM card that is merged with main memory. If the card is not merged or it is write-protected, it will not be affected by this reset.
    Hardware symptoms and solutions I. The display screen has a blue/purple blotch of color, even when the unit is off The screen is damaged, and the calculator requires service. Please contact HP . II. All of the pixels on the screen are lit (blue)
    1. Try to adjust the contrast by holding down the ON key and repeatedly pressing the [ - ] key.
    2. If the screen is still dark, try to halt the system using the keyboard.
    3. If this does not correct the problem, try to reset the system using the reset hole with the batteries removed.
    4. If this does not work, remove the batteries and let the unit sit for 48 hours. After 48 hours, replace the batteries. If the problem persists, attempt a memory reset. Although removing the batteries for 48 hours should erase the user memory, performing a memory reset will ensure that the calculator is reset to its factory defaults.
    5. If the problem persists, the unit requires service. Please contact HP .

    Dec 30, 2010 | HP 48gx Calculator

    1 Answer

    I installed the new 2.1 OS to my TI-nspire and when it restarts it always freezes at the "loading os" screen with the bar completely filled all the way.

    First of all you will need to erase your calculator by holding Home(house key)+enter+P and than the on button. Make sure the on button is the last button you press. Then, select option 2 to erase your operating system. Then, you need to obtain the operating system 2.0 for the calculator. Download and install that onto the calculator. It should install operating system 2.0. Once you do that, download and install operating system 2.1. This will allows you to upgrade your calculator to the latest version and get past the full bar loading screen. Let me know if you need anymore help.

    Aug 19, 2010 | Texas Instruments TI-Nspire Graphic...

    1 Answer

    I downloaded the new OS and it reloaded and it never turned back on. it just stays on the loading screen.

    First of all erase your operating system. Then, find and install operating system 2.0 first. Once you do that, you can download and install the latest operating system onto your calculator. It should finish the loading screen.

    Aug 06, 2010 | Texas Instruments TI-Nspire Graphic...

    1 Answer

    How do I reset it to the factory settings?

    To reset the Ram, press [2nd][MEM][7:Reset][1:All Ram][2:Reset] Press the [CLEAR] button to erase the "Ram Cleared" message.
    Occasionally, one has to adjust the screen contrast.

    To adjust screen contrast
    1. Press [2nd] key and release it.
    2. Press and hold
    • Up arrow to darken the screen, or
    • Down Arrow to lighten it
    Hope it helps.

    Dec 09, 2009 | Texas Instruments TI-83 Plus Calculator

    1 Answer

    The Line( command on my Calculator does not erase

    If your calculator is drawing lines in response to the Line( command, there is no objective reason why it would fail to obey the same command with a different argument.
    To make sure we are talking about the same thing, let me restate the correct syntax for both usages.

    Line(X1,Y1,X5,Y5) draws a line joining the points A(X1,Y1) to point E(X5,Y5).
    With the foregoing line already drawn, running the command
    Line(X3,Y3,X4,Y4,0) will erase the segment of the already drawn line that lies between the points C(X3,Y3) and D(X4,Y4)

    1. To be sure to obtain the intended effect, draw your graph and press [2nd][QUIT] to go to the main calculator screen.
    2. Then you press [2nd][CATALOG] L to jump to the first command that starts with L.
    3. Find the Line( command and press [ENTER].
    4. The command echoes on main screen.
    5. Complete the command by supplying the coordinates of the points, the 5th argument 0 if needed for erasure, and press [ENTER].
    6. The graph is redrawn with the relevant segment missing.

    In this exemple it is understood that the points C and D belong to the line drawn. The erasing is effected by the additional argument with value 0. If the points are not on the line, the segment erased may be shorter and may even be of length 0 (no erasure).

    If the command still misbehaves, you may have to use the [2nd][DRAW][1:ClrDraw] to clear the drawing and start again.

    I trust you will forgive me for all this information that you already know, but I am thinking about other visitors who might not know how to use the command correctly.

    Hope it helps.

    Nov 16, 2009 | Texas Instruments TI-84 Plus Silver...

    1 Answer


    Open the HOME application (main calculator window). Press [2nd][MEM].
    An exemple of what you see.


    Everything in the list can be erased except System, FlashApp, Archive.
    Even FlashApp and Archive can be erased if you so choose.

    By Pressing F1 in that screen you you can select 1: Ram then 1: All Ram as in following picture.


    Here is what it looks like after I say OK in previous screen.


    History contains all the commands I executed from the command line. To erase the history, I return to Home screen, press [2nd][CATALOG] and use scroll key (arrow key) to reach the Clear Commands. They all start with Clr. Select ClrHome and press {ENTER][ENTER]
    Here what I get when I execute the command.

    As you can see the history has been erased.
    Why do I take all these precautions: because I do not know what kind of precious data and apps you have.

    I will now show you the amount of space the an app can take.
    In Home screen press [2nd][Var-Link] then [2nd][F7:FashApps].
    On the next screen there are two FlashApps, each with the number of bytes it occupies. You can now select one of the Apps that you do not need (as Polynomial here),
    Then press F1 and select delete and press ENTER.

    This shows you the steps you follow if you do not want to erase everything. The next picture shows you a more radical way to erase things. You will be asked to confirm the deletion. Once you say yes, there is no way to restore anything unless you transfert the Apps again the calculator.

    Now you are on your own. Before you confirm an operation by pressing ENTER/YES, make sure that that is what you want. Once something is erased , it is erased for good. There is no unerase command.

    Good Luck

    Oct 28, 2009 | Texas Instruments TI-89 Calculator

    1 Answer

    Numbers are messed up on the screen. can't read what it says.


    Press the [CLEAR] key to erase everything on the screen. Adjust screen contrast as follows

    Reducing the contast
    1.Press [2nd] key and release it
    2.Press [DownArrow] and release it
    3. Keep repeating the sequence until contrast is adequate.

    To increase contrast Do the same but press [UpArrow] instead of [DownArrow]

    Hope it helps

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

    2 Answers


    Hi there,

    Here is the a clippings for the info on your battery.


    If you you want a the copy of the user manual, just let me know.


    Aug 08, 2009 | HP 19BII Calculator

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