Question about Texas Instruments TI-89 Calculator

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Not registering when I press the 2nd key

Calculator not registering when I press the 2nd key. Have tried both as the "2nd" key, and also using the CUT function. Button press feels like all the others as far as haptic feedback is concerned.

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The 2nd key is not supposed to register anything. It puts the calculator in a waiting state until you press a valid key.

Posted on Dec 04, 2013

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Posted on Jan 02, 2017

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SOURCE: TI 84 plus

I had the same problem. Found a posting on Youtub of someone messing up their TI-84 for fun by sticking a paper clip in it... One on the comments noted that dust in the data port can also cause it to not work right. I did not see anything dirt or dust on/in my TI-84. But I went ahead and took a can of compressed air and blasted the data port. Problem solved, it's been working fine ever since... If you have a receipt, and it's less than a year... TI replaces for free... other wise it cost $55 + $6 for shiping... 1-972-917-8324 is their number... Why it's not an 1-800.... I don't know... Hope this helps

Posted on Sep 26, 2007

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SOURCE: screen frozen calculator not responding to buttons pressed.

give it a factory reset, this works, you will lose any unarchived data :

Posted on Sep 03, 2008

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SOURCE: screen is all black

Okay, I tried all these things, but what finally worked for me was holding the down arrow and tapping the 2nd button.

Posted on Sep 05, 2008

SOURCE: finding function "e" on TI-36X Solar calculator

buy another one

Posted on Oct 16, 2008

  • 1 Answer

SOURCE: TI-84 Plus: Calculator Unresponsive

Try pressing the "On" button a couple times. That should work

Posted on Jan 30, 2009

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Black screen

Try adjusting the contrast. Turn the calculator on, press and release the 2ND key, then press and hold the down-arrow until the screen lightens. If you go too far, press and release the 2ND key then press and hold the up-arrow key.

Sep 06, 2013 | Texas Instruments TI-83 Plus Calculator

1 Answer

Calculator does not go on

TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and hold the 2ND key, then repeatedly press the + key and see whether the display lights up. If you go too far, use the 2ND and - keys.

Jan 23, 2013 | Texas Instruments TI-89 Calculator

1 Answer

How to calculate 1.025^4

How to Use a TI-30XA
The TI-30XA is a scientific calculator with many functions. You can calculate problems with fractions and decimals, as well as solve problems of probability and functions. A scientific calculator computes the number sentence you type in using the order of operations: parentheses first, then roots and exponents, then division and multiplication and, finally, addition and subtraction.

  1. How to Use a TI-30XA
    • 1

      Press the [ON/C] key to turn on the calculator. Press the [OFF] key to turn it off. To use the calculator in solar mode, put the solar panel in the light and then press the [ON/C] key. To turn it off when in solar mode, slide the calculator cover back on and it will automatically shut off.

    • 2

      Replace the batteries by first removing the cover and placing it face down. Use a Phillips-head screwdriver to unscrew the back panel. Remove the back panel and change the batteries. Screw the back panel back on. Press [OFF] [ON/C] and [ON/C].

  • Use the basic operation keys for addition [+], subtraction [-], multiplication [x] and division [/]. To change the signs of your values from positive to negative or vice versa, press the [+ -] key before the numbers you enter. Use the parentheses, [(] and [)], to command the calculator to solve what is inside the parentheses first. Press the [=] to solve the number sentence you entered into the calculator.

  • 4

    Find percents of a number by first typing in the number, then [x], then the percent number, [2nd], [%] and, finally, [=]. The [2nd] key allows you to use the commands that are written above each key. For example, to find 20% of 100, type in 100 [x] 20 [2nd] [%] [=] and the display will show the answer, 20.

  • 5

    Turn decimals into fractions by entering the decimal value, then pressing the [2nd] and [F D] keys, then [=]. Turn the fraction back into a decimal by pressing [2nd] and [F D] again. For example, to turn 0.5 into a fraction, type in 0.5 [2nd] [F D] [=].

  • 6

    Turn mixed numbers into improper fractions by entering the mixed number first. Type in the whole number, then the [a b/c] key, then the numerator, the [a b/c] key again and the denominator. Next, press [2nd] [d/c] [=], and the calculator will convert your mixed number into an improper fraction. Press [2nd] [d/c] again to turn it back into a mixed number. For example, to turn 1 1/2 into an improper fraction type in 1 [a b/c] 1 [a b/c] 2 [2nd] [d/c] [=], and the display will show the answer 3/2.

  • 7

    Switch the notation setting of the calculator between engineering, scientific and floating. To select scientific notation, press the [2nd] and [SCI] keys; this will display your answers in scientific notation as a number between 1 and 10 to a power of 10. Press [2nd] [ENG] to switch to the engineering setting; this setting displays values as a number with an exponent that is a multiple of 3. Press [2nd] [FLO] to switch to the floating setting. This is considered standard notation and will display the answer as a standard number.

  • 8

    Use the left arrow key to go back and delete numbers to the right of the cursor that you typed into the display. This must be done before you press [=]. To clear the screen, values and operations, press [ON/C] and [ON/C] again in battery mode, or [CE/C] and [CE/C] again in solar mode.

  • Hope it helps your problem. Thanks!

    Jan 03, 2013 | Texas Instruments TI-30XA Calculator

    1 Answer

    I have a TI 86 calculator that I have not used in a few years. When I turned it on yesterday, the screen is mostly black and I can not see anything that is typed. I tried replacing the batteries but am...

    Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key until the screen lightens. If you go too far, press and release the 2nd key and then press and hold the up-arrow key.

    Jul 19, 2011 | Texas Instruments TI-86 Calculator

    1 Answer

    My son's TI-83 calculator screen is very dark. The calculator appears to be working but I can barely read the screen. Any suggestions?

    Try adjusting the screen contrast. Turn the calculator on. Press and release the 2ND key, then press and hold the down-arrow key to darken the text. If you go too far, use the 2ND and up-arrow keys to lighten the text.

    Feb 09, 2011 | Texas Instruments TI-83 Plus Calculator

    2 Answers

    How do i fix my black screen on my TI83 calculator? i just replaced the batteries and my screen is black, what do i do?

    Turn the calculator on. Press and release the 2nd key. Press and hold the down-arrow key for a few seconds to lighten the screen. If you go too far, press and release the 2nd key, then press and hold the up-arrow key.

    Aug 13, 2010 | Texas Instruments TI-83 Plus Calculator

    1 Answer

    How do you find standard deviation on the calculator?

    Press 2nd [CSR] (shift-7) to clear the statistical registers. Use the Sigma+ key (just above STO) to enter data points. Use 2nd [Sigma-] to remove erroneous data points. Use 2nd [sigma x n] (shift-divide) to compute the population standard deviation, or 2nd [sigma x n-1] (just to the left of the previous key) to compute the sample standard deviation.

    Jun 07, 2010 | Texas Instruments TI-30XA Calculator

    1 Answer

    How to clear the memory key on Texas instrument scientific calculator TI 30XA or use the memory key

    Your calculator has 3 memories (M1, M2,M3)
    To store the number 170 in M1 use 170[STO]1
    To recall a number from M1 use [RCL]1
    To add a number to the content of M1 [2nd][SUM]1 (adds displayed value to contents of M1).
    [2nd][EXC] 2 exchanges the value already displayed with the contents of M2:

    To erase (clear) a memory register, just store 0 in it.

    Hope it helps.

    Oct 22, 2009 | Texas Instruments TI-30XA Calculator

    1 Answer

    If the numbers are not registering on the screen what is the probability that the calculator is conmpletely busted????


    1.Turn calculator on and adjust screen contrast

    Press [2nd] , release
    Press [UPArrow] release
    Repeated the two steps until contrast is adequate.

    2. An application may be running.
    Press [ON] key several times to interrupt and [CLEAR] Screceen

    3. Reset memory
    [2nd][MEM][7:Reset][1:All Ram][2:Reset] then [Clear] screen. The blinking cursor should come back on.

    Hope it helps. .

    Aug 05, 2009 | Texas Instruments TI-83 Plus Calculator

    2 Answers

    TI-84 dowlnoad error?

    Make certain you have registered your calculator on their site. I think you need to enter you internal number. The internal number can be found by pressing the 2nd key, then the plus key and choosing about in this screen.

    Jun 09, 2009 | Texas Instruments TI-84 Plus Silver...

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