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TI-55-II Calculator malfunction

The function of all the keys is very erratic. If a key is depressed, often it will not register on the LCD or perform its function. If I use more force to depress the key, it may work, or it my not work. In the case of a number key, it may continue to add numbers to the LCD until it is released (55555 for example, when key 5 is depressed). I replaced the batteries, but there is no change in the problem. Any help you can give will be appreciated.

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SOURCE: how unstick calculator key - depressed key won't

Hello,
Just a thought: Use twizzers to grab the key and pull it up.
Hope it helps.

Posted on Oct 29, 2009

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1 Answer

Not registering when I press the 2nd key


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

Nov 27, 2013 | Texas Instruments TI-89 Calculator

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What should I do if my calculator won't turn on?


The first part of the post is inserted for completeness (and in case you need to readjust the screen). You can just skim through it.

Part A or B will reset the memory. Please read the whole post before attempting the procedures described here.

The first diagnostics you should perform are:
  1. Make sure batteries are good and inserted correctly, respecting the polarity diagram: Yes, I myself made this mistake and it must be ruled out before doing anything else.
  2. After a change of batteries, the screen contrast can change: It may become too dark or too light. If it is too dark, you would not think about a malfunction because you see something on the scree. BUT it the screen is too light, it is easy to conclude that there is a malfunction because you do not see what the calculator is doing after you press a key.
  3. So, the second measure is to adjust the contrast. Press [2nd] key and Release it. Then Press and HOLD the UpArrow until screen is dark enough.
  4. A third easy measure is to use the TIConnect software (available on education.ti.com) to retrieve the device Info, and if calculator is recognized to reinstall or update the OS. You need a TI USB SilverLink cable.
Here are some more procedures to perform in the order they are presented. Please read the post till the end.

A
  1. Remove one of the AAA batteries.
  2. Press and hold the [CLEAR] key.
  3. While holding [CLEAR], reinsert the AAA battery and then
  4. turn the calculator on.
  5. the calculator should display the message "RAM Cleared".
  6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".
B.
  1. Remove batteries including the backup battery for 5minutes.
  2. After the 5 minute period, reinsert all of the batteries and
  3. turn the calculator on.
  4. Adjust the contrast if necessary. (see above)
C.

This step requires the reinstallation of the system. So to use it you must download the TIConnect 1.6 software from education.ti.com. You must have the TI USB SilverLink or the TI Black serial cable ready.You must be connected to the Internet.
  1. Remove one of the AAA batteries.
  2. Press and hold the [DEL] key.
  3. While holding [DEL], reinsert the AAA battery and then
  4. turn the calculator on.
  5. the calculator should display "Waiting...Please install calculator software now".
  6. Connect the TI connectivity cable between the computer and the calculator.
  7. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OS Downloader.
  8. Follow the on-screen directions to reinstall the calculator's OS.
If the message "Error! Press any key to turn unit off. Then turn unit back on." appears on the graphing calculator, quickly, remove one battery from the calculator and reinstall it while the transfer is taking place.

You have several ways to connect the calculator
  • Serial Black cable that used to ship with the TI 83 Plus. It connects to a serial port on a computer and to the I/O port on the calculator. It requires the Graph Link software available on the TI web site (Downloads, Software and Apps, Connectivity)
  • USB Silver Link cable. It connects a USB port on the computer to the the I/O port on the calculator. It requires the TI connectivity software, also available on the TI web site.
  • An I/O cable to connect two calculators through their I/O ports.

Aug 05, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Calculator software?


Part A or B will reset the memory. Part C answers your specific concerns. Please read the whole post before attempting the procedures described here.

The first diagnostics you should perform are:
  1. Make sure batteries are good and inserted correctly, respecting the polarity diagram: Yes, I myself made this mistake and it must be ruled out before doing anything else.
  2. After a change of batteries, the screen contrast can change: It may become too dark or too light. If it is too dark, you would not think about a malfunction because you see something on the scree. BUT it the screen is too light, it is easy to conclude that there is a malfunction because you do not see what the calculator is doing after you press a key.
  3. So, the second measure is to adjust the contrast. Press [2nd] key and Release it. Then Press and HOLD the UpArrow until screen is dark enough.
  4. A third easy measure is to use the TIConnect software (available on education.ti.com) to retrieve the device Info, and if calculator is recognized to reinstall or update the OS. You need a TI USB SilverLink cable.
Here are some more procedures to perform in the order they are presented. Please read the post till the end.

A
  1. Remove one of the AAA batteries.
  2. Press and hold the [CLEAR] key.
  3. While holding [CLEAR], reinsert the AAA battery and then
  4. turn the calculator on.
  5. the calculator should display the message "RAM Cleared".
  6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".
B.
  1. Remove batteries including the backup battery for 5minutes.
  2. After the 5 minute period, reinsert all of the batteries and
  3. turn the calculator on.
  4. Adjust the contrast if necessary. (see above)
C.

This step requires the reinstallation of the system. So to use it you must download the TIConnect 1.6 software from education.ti.com. You must have the TI USB SilverLink or the TI Black serial cable ready.You must be connected to the Internet.
  1. Remove one of the AAA batteries.
  2. Press and hold the [DEL] key.
  3. While holding [DEL], reinsert the AAA battery and then
  4. turn the calculator on.
  5. the calculator should display "Waiting...Please install calculator software now".
  6. Connect the TI connectivity cable between the computer and the calculator.
  7. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OS Downloader.
  8. Follow the on-screen directions to reinstall the calculator's OS.
If the message "Error! Press any key to turn unit off. Then turn unit back on." appears on the graphing calculator, quickly, remove one battery from the calculator and reinstall it while the transfer is taking place.

You have several ways to connect the calculator
  • Serial Black cable that used to ship with the TI 83 Plus. It connects to a serial port on a computer and to the I/O port on the calculator. It requires the Graph Link software available on the TI web site (Downloads, Software and Apps, Connectivity)
  • USB Silver Link cable. It connects a USB port on the computer to the the I/O port on the calculator. It requires the TI connectivity software, also available on the TI web site.
  • An I/O cable to connect two calculators through their I/O ports.

Apr 03, 2010 | Texas Instruments TI-83 Plus Silver...

2 Answers

My Ti-84 recently stopped working. I tried using


Let us start with the easy stuff:
  1. The warranty is for one year in the US and Canada. The length my differ in other poarts of the world. Check the documentation that shipped with your calculator.
  2. If you want to have it repaired, you can contact the TI customer care services: email them at ti-cares@ti.com, they should be able to tell you where to send it, take it, and much it should cost you.
  3. The lowest retail price for the calculator in Canada is 130 $CAN.
  4. No, I cannot tell you if this mulfunction is common with this type of calculators.
  5. To tell you the truth I am not even convinced (without proper diagnostics) that the calculator is malfuctioning. Call me a doubting Thomas.
The fisrt diganostics you should perform are:
  1. Make sure batteries are good and inserted correctly, respecting the polarity diagram: Yes, I myself made this mistake and it must be ruled out before doing anything else.
  2. After a change of batteries, the screen contrast can change: It may become too dark or too light. If it is too dark, you would not think about a malfunction because you see something on the scree. BUT it the screen is too light, it is easy to conclude that there is a malfunction because you do not see what the calculkator is doing after you press a key.
  3. So, the second measure is to adjust the contrast. Press [2nd] key and Release it. Then Press and HOLD the UpArrow until screen is dark enough.
  4. A third easy measure is to use the TIConnect software (available on education.ti.com) to retrieve the device Info, and if calculator is recognized to reinstall or update the OS. You need a TI USB SilverLink cable.
Here are some more procedures to perform in the order they are presented. Please read the post till the end.

A
  1. Remove one of the AAA batteries.
  2. Press and hold the [CLEAR] key.
  3. While holding [CLEAR], reinsert the AAA battery and then
  4. turn the calculator on.
  5. The calculator should display the message "RAM Cleared".
  6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".
B.
  1. Remove batteries including the backup battery for 5minutes.
  2. After the 5 minute period, reinsert all of the batteries and
  3. turn the calculator on.
  4. Adjust the contrast if necessary. (see above)
C.

This step requires the reinstallation of the system. So to use it you must download the TIConnect 1.6 software from education.ti.com. You must have the TI USB SilverLink or the TI Black serial cable ready.You must be connected to the Internet.
  1. Remove one of the AAA batteries.
  2. Press and hold the [DEL] key.
  3. While holding [DEL], reinsert the AAA battery and then
  4. turn the calculator on.
  5. The calculator should display "Waiting...Please install calculator software now".
  6. Connect the TI Connectivity cable between the computer and the calculator.
  7. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OS Downloader.
  8. Follow the on-screen directions to reinstall the calculator's OS.
If the message "Error! Press any key to turn unit off. Then turn unit back on." appears on the graphing calculator, quickly, remove one battery from the calculator and reinstall it while the transfer is taking place.

You have several ways to connect the calculator
  • Serial Black cable that used to ship with the TI 83 Plus. It connects to a serial port on a computer and to the I/O port on the calculator. It requires the Graph Link software available on the TI web site (Downloads, Software and Apps, Connectivity)
  • USB Silver Link cable. It connects a USB port on the computer to the the I/O port on the calculator. It requires the TI connectivity software, also available on the TI Web site.
  • A USB mini A to mini B cable to connect two units.
  • An I/O cable to connect two calculators through their I/O ports.


Feb 13, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

How unstick calculator key - depressed key won't


Hello,
Just a thought: Use twizzers to grab the key and pull it up.
Hope it helps.

Oct 10, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

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type 15 then click a button that looks like this^. then 365. Then hit enter. it is like a normal clcutor except with more function. Sometimes you need to use the 2nd and the alpha button to do some functions.

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I actually fixed mine!!!! Mine was acting up too. I found somewhere that the no/slow key response could be due to a short in the I/O socket. I blew into it really hard (you may want to use compressed air, but I didn't have any onhand), and it works perfectly now!!!!!!!!!! I hope this helps.

Aug 27, 2008 | Texas Instruments TI-84 Plus Calculator

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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

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