I got it to 19 but it says 90 next ti it ? - Magnum DeltaForce CB Radio

Hi twylazhangzh,

Sound like your Ti 84 Plus is really over loaded and, can't function properly. You can fix that by installing the newest Ti 84 Plus 2.55v. MP OS. operating system.

If you have a friend that has a Ti 84 Plus or, Ti 84 Plus Silver Edition you can connect the two calculators together through the IO link ports and, they can send you a copy of their OS while you receive it on your Ti 84 Plus. Hopefully your friend will have Ti84 Plus 2.55v. MP OS on their calculator or, it might not work.

If you can't find a calculator to connect to you can connect your Ti 84 Plus to a computer that has Ti Connect software on it. If you need to connect your Ti 84 Plus to a computer just keep following my instructions below.

First, you need to download and, install Ti Connect to your computer. If you don't need any help installing Ti Connect goto Procedure 1.

If your computer's OS is XP or Mac and, you need instructions to download and, install Ti Connect click, "Install Ti Connect on my XP or Mac OS". Just follow Procedure 1 at that posting and, come back to this posting to finish downloading and, installing Ti84 Plus 2.55v. MP OS to your calculator.

If your computer's OS is Windows 7 and, you need instructions to download and, install Ti Connect click, "Install Ti Connect on my Windows 7 OS". Just follow Procedure 3 at that posting and, come back to this posting to finish downloading and, installing Ti84 Plus 2.55v. MP OS to your calculator.

Procedure 1 to installing Ti84 Plus 2.55v. MP OS

1). You can also get the latest copy of Ti84 Plus 2.55v. MP OS and, guidebook by going to the Texas Instruments web site. You can get to that site instantly by clicking, "Ti 84 Plus 2.55v. MP OS!" Once your at the Ti site click the Download Item, "Ti84 Plus family operating system". Next you can login or, click "continue as guest". I'd would click the "continue as guest". Once you have click, "continue as guest" the Ti84 Plus family operating system will download to you.

Next, click "SAVE" and then a window to a folder will pop up. It is probably a window to a folder that you download too. If so, you may want to change it and, save to this folder, "My Documents \ My TI Data \ Downloads". You can also go back and, download the Ti 84 Plus guidebook too, if needed.

Link your computer and, Ti 84 Plus calculator with the USB cable or, Direct Black Link cable that came with the Ti 84 Plus calculator. Next, drag the Ti 84 Plus 2.55v MP OS that you saved earlier in "My Documents \ My TI Data \ Downloads" out of that folder and, drop it in the "Ti Connect" icon on the desktop. Click, "Continue" when the "Erase Warning" pops up and, the new Ti 84 Plus 2.55v MP OS will begin to install.

Next, the Ti Device window should pop up and, highlight the port when found that your Ti 84 Plus is using, USB1 cable or, Direct Black COM1.



When the Ti Device Explorer finds and, highlights your calculator's information click, "Select." Then click, "Yes" when the next window shows up with your calculator's information and, the OS will continue to download. Upon completion the newest Ti 84 Plus 2.55v. MP OS will be installed.

If you run into any trouble with software or, drivers just comment to what failed at this posting and, I'll be glad to help you.

Hi biancaaii,

You need to re-install the Ti 84 Plus OS, ASAP!!! You can fix the problem by installing the newest Ti 84 Plus 2.55v. MP OS. operating system.

If you have a friend that has a Ti 84 Plus or, Ti 84 Plus Silver Edition you can connect the two calculators together through the IO link ports and, they can send you a copy of their OS while you receive it on your Ti 84 Plus. Hopefully your friend will have Ti84 Plus 2.55v. MP OS on their calculator or, it might not work.

If you can't find a calculator to connect to you can connect your Ti 84 Plus to a computer that has Ti Connect software on it. If you need to connect your Ti 84 Plus to a computer make sure the Ti Connect software is operating properly. You do not want any hang-ups while installing the Ti 84 Plus OS. Be careful, even a power failure during the process of installing the OS will destory your calculator.

Procedure 1 to installing the latest Ti84 Plus 2.55v. MP OS

1). You can get the latest copy of Ti84 Plus 2.55v. MP OS and, guidebook by going to the Texas Instruments web site. You can get to that site instantly by clicking, "Ti 84 Plus 2.55v. MP OS!" Once your at the Ti site click the Download Item, "Ti84 Plus family operating system". Next you can login or, click "continue as guest". I'd would click the "continue as guest". Once you have click, "continue as guest" the Ti84 Plus family operating system will download to you.

Next, click "SAVE" and then a window to a folder will pop up. It is probably a window to a folder that you download too. If so, you may want to change it and, save to this folder, "My Documents \ My TI Data \ Downloads". You can also go back and, download the Ti 84 Plus guidebook too, if needed.

Link your computer and, Ti 84 Plus calculator with the USB cable or, Direct Black Link cable that came with the Ti 84 Plus calculator. Next, drag the Ti 84 Plus 2.55v MP OS that you saved earlier in "My Documents \ My TI Data \ Downloads" out of that folder and, drop it in the "Ti Connect" icon on the desktop. Click, "Continue" when the "Erase Warning" pops up and, the new Ti 84 Plus 2.55v MP OS will begin to install.

Next, the Ti Device window should pop up and, highlight the port when it finds what your Ti 84 Plus is using, USB1 cable or, Direct Black COM1.


When the Ti Device Explorer finds and, highlights your calculator's information click, "Select." Then click, "Yes" when the next window shows up with your calculator's information and, the OS will continue to download. Upon completion the newest Ti 84 Plus 2.55v. MP OS will be installed.

If you run into any trouble with software or, drivers just comment to what failed at this posting and, I'll be glad to help you.

Hi kelsers,

You need to re-install your calculator's OS. After this process your Ti 89 Titanium will operate properly. If you do the process below make sure you use new batteries.

Warning!!! If you do this procedure make sure that your computer and, calculator are connect. Use Ti Connect software and, make sure you can install the OS on the calculator without any interruption. At any time even at the very beginning of this process, if your computer or, calculator gets interrupted or you have a power failure during the installation of the OS, your calculator will be destroyed. So not attempt this procedure during a thunder storm.

You can use the Ti OS Downloader but, you will have no idea what OS is stored by the Ti OS Downloader. So, I suggest following my instructions and, installing the newest Ti 89 Titanium OS 3.10v.

Procedure to installing the newest Ti 89 Titanium OS 3.10v.

You can also get the latest copy of Ti 89 Titanium OS 3.10v by going to the Texas Instruments web site. You can get to that site instantly by clicking, "Ti 89 Titanium OS 3.10v." Once your at the Ti site click the Download Item, Ti 89 Titanium OS 3.10v. Next you can login or, click "continue as guest". I'd would click the "continue as guest". Once you have click, "continue as guest" the Ti 89 Titanium OS 3.10v. will download to you. Click, "SAVE". And then a folder will pop up. It is probably a folder that you download too. If so, you may want to change it and, "Save as" to this folder, "My Documents \ My TI Data \ Downloads". You can also go back and, download the Ti 89 Titanium guidebook too, if needed.

Link your computer and calculator with the USB cable or, Direct Black Link cable that came with the calculator.

Remove one of the AAA batteries. Press and hold the [APPS] key, and while holding the [APPS] key, replace the battery and turn the unit on. On the older TI-89 you should see "Press I to install code...", and you should press the [9] key to continue. But, on your Ti 89 titanium it should say, "Waiting to receive..." or, "Waiting to received OS...". Now you need to follow the instructions in the paragraph below to restore the calculator's operating system.

Next, drag the Ti 89 Titanium OS 3.10v. that you copied earlier to "My Documents \ My TI Data \ Downloads" out of that folder and, drop it in the "Ti Connect" icon on the desktop. Next the OS Downloader Warning will pop-up. Click, "OK" to continue and, the new OS will begin to install. The Ti Device window should pop up and, click on to the port where your Ti 89 Titanium is located, USB1 cable or Direct Black COM1. Just click, "Select" and, the OS will continue to download. Upon completion the newest Ti 89 Titanium OS 3.01v. will be installed.

Hi mcniester,

If you need to install Ti Connect software, goto the paragraph (1) below. If you do not need to install Ti Connect software goto the paragraph (2), "Procedure to installing the newest Ti 84 Plus OS 2.35v."


1). You can get the latest copy of Ti Connect software by going to the Texas Instruments web site. You can get to that site instantly by clicking, "Ti Connect software" At this Ti site under "View: Connectivity Software", Click, "the OS link that applies to your computers operating system". Next, click the Download Item, "Ti Connect software for ....OS". Next you can login or, click "continue as guest". I'd would click the "continue as guest". Once you have click, "continue as guest" the Ti Connect software for ....OS will be download to you. Click, "OPEN" and the software will start installing. You will have to click "Next" a few times but, it install pretty fast. Once the Ti connect software has successfully installed follow the instructions to the
"Procedure to installing the newest Ti 84 Plus OS 2.35v." below.

Procedure to installing the newest Ti 84 Plus OS 2.35v.

2). You can also get the latest copy of Ti84 Plus 2.35v OS and guidebook by going to the Texas Instruments web site. You can get to that site instantly by clicking, "Ti 84 Plus 2.35v. OS!" Once your at the Ti site click the Download Item, "Ti84 Plus family operating system". Next you can login or, click "continue as guest". I'd would click the "continue as guest". Once you have click, "continue as guest" the Ti84 Plus family operating system download to you. Click "SAVE" And then a folder will pop up. It is probably a folder that you download too. If so, you may want to change it and, save to this folder, "My Documents \ My TI Data \ Downloads". You can also go back and, download the Ti 84 Plus guidebook too, if needed.

Link your computer and calculator with the USB cable or Direct Black Link cable that came with the calculator. Next, drag the Ti 84 Plus OS 2.35v that you copied to "My Documents \ My TI Data \ Downloads" out of that folder and, drop it in the "Ti connect" icon on the desktop. Click, "Continue" and, the new Ti 84 Plus OS 2.35v will begin to install. The Ti Device window may pop up and, click on to the port your Ti 84 Plus is using, USB1 cable or Direct Black COM1. Just click, "Select" and, the OS will continue to download. Upon completion the newest Ti 84 Plus OS 2.35v will be installed.

I'm going to take it that your Ti 89 upgrade is a Ti 89 OS update. Check and make sure your Ti 89 OS is up to date with with OS 2.09v. For ti 89 Titanium your OS should be 3.10v. To check the version of your OS from the home screen press, [F1] [A]-About. The OS version should show up at the second line from the top of the "About" window that pops up. If you don't have the updated OS version you should go to the Ti web site and download it. Now let's try getting the computer and calculator connected.

When you have your computer and, Ti 89 calculator connected the calculator should be on and, at the home screen.

Procedure 1.

Go to your Start Menu and search for Device Manager.

Open up Device Manager.
Scroll to the USB controller and click the +. Turn the calculator ON then connect the USB cable to your PC. A new device will appear on the USB controller.
Right-click on the new device and, choose Update Driver Software. The Hardware Update Wizard will appear.
Choose "Browse my computer for driver software".
In the search field type in C:\Program Files\TI Education\Driver Files. Look for the tiehdusb.inf driver file.
Click on Next to finish installing the driver properly
Once the driver is installed click Finish.

Procedure 2.

Now click on the "Ti Connect" software on your desktop. Double-click the Ti Device Explorer located to the left inside the Ti connect window.

The software should start looking for your calculator. A pop-up should display looking something like what is pictured below. Under device your calculator should display. If your calculator is located the software will highlight on to it. Click, "Select" and another window should pop-up.

The next pop-up should look something like this. If your Ti 89 is present it will show up next to device and, probably won't say Titanium. Your cable type and port should be listed too.

If all the information is correct in the window that appears click "OK" and, you should be able to start downloading. You can skip the rest of the procedures. If your Ti 89 still won't connect to the computer goto Procedure 3 unless you have already tried Procedure 3, then goto procedure 4.

Procedure 3.

If the above procedure still does not help then try un-installing and, re-installing the Ti Connect software. After un-installing re-boot your computer. After re-booting your computer you can get the latest copy of Ti Connect software by going to the Texas Instruments web site. You can get to that site instantly by clicking, "Ti Connect software" At this Ti site under "View: Connectivity Software", Click, "the OS link that applies to your computers operating system". Next, click the Download Item, "Ti Connect software for ....OS". Next you can login or, click "continue as guest". I'd would click the "continue as guest". Once you have click, "continue as guest" the Ti Connect software for ....OS will be download to you. Click, "Save" and then a folder will pop up. It is probably a folder that you download too. If so, you may want to change it and, 'Save as" to this folder, "Desktop."

Next right-click the Ti Connect executable on your desktop and select, "Properties." Then click the "Compatibility" tab located at the top of the "Properties" window. Click the box next to "Run this program in compatibility mode for." and select "Windows XP Service Pack 2" from the drop-down menu. Click "Apply" and choose "OK." Double-click the TI Connect executable and select "Next" to begin the installation. Click "Yes" to OK the installation process to proceed. Then click "Finish" to complete the installation. Next, reboot your computer.

Now go back and try Procedure 1 and 2 again. If you have already tried Procedure 1 and 2 twice, go to Procedure 4.

Procedure 4.

If the above procedures fail then try a different cable and if possible a different computer.
If trying different cables/computers fails, please contact and fill out a Ti Cares Customer Assistance Form. You can get there by clicking this link, " Ti Cares Customer Assistance Form "

Attach a system information file to the email reply you receive from "Ti Cares Customer Assistance Form."

To get the system information file:

Go to Start Menu and search for System Info
Once loaded, click on File and choose Save
Name the file FirstNameLastName.nfo
Please check to make sure that system info file(.nfo) is the selected type of file.
Attach the .nfo file to the email reply

Even if you cannot connect it to the computer you can still transfer applications from a working calculator.

Here is a copy of a post I wrote to answer your question.

If you have a USB SilverLink cable, use it to connect the calculator though the I/O (round) port.
If you do not have a USB SilverLink cable, you can use the mini USB to USB Direct cable but you will have to install the correct driver for it.

I do not know what computer operating system you are running and I use Windows XP so I will describe the installation procedure for Windows XP SP3.

Install TI connect 1.6 for Windows; if your system is Vista you must install a patch available on the TI website, at the same page where you find TI Connect.

After you install TI Connect, connect you calculator to the computer with the mini USB standard USB Direct cable. Windows will detect the calculator and will try to install the drivers. You will have something that is similar to what is on the three screen captures I am inserting in the post. On the last screen, choose the TI Educational Handheld device and click next.







When Windows asks to stop installation, click continue anyway


After the installation, click finish.

Device manager will show you something like what is on next screen (TI Educational Handheld device)

Run TI Connect to verify that the calculator is recognized. Connect your computer to the Internet and click the Updates Button on the TI Connect tool bar.

Even if you cannot connect it to the computer you can still transfer applications from a working calculator.

Here is a copy of a post I wrote to answer that question.

If you have a USB SilverLink cable, use it to connect the calculator though the I/O (round) port.
If you do not have a USB SilverLink cable, you can use the mini USB to USB Direct cable but you will have to install the correct driver for it.

I do not know what computer operating system you are running and I use Windows XP so I will describe the installation procedure for Windows XP SP3.

Install TI connect 1.6 for Windows; if your system is Vista you must install a patch available on the TI website, at the same page where you find TI Connect.

After you install TI Connect, connect you calculator to the computer with the mini USB standard USB Direct cable. Windows will detect the calculator and will try to install the drivers. You will have something that is similar to what is on the three screen captures I am inserting in the post. On the last screen, choose the TI Educational Handheld device and click next.







When Windows asks to stop installation, click continue anyway


After the installation, click finish.

Device manager will show you something like what is on next screen (TI Educational Handheld device)

Run TI Connect to verify that the calculator is recognized. Connect your computer to the Internet and click the Updates Button on the TI Connect tool bar.

If you have a USB SilverLink cable, use it to connect the calculator though the I/O (round) port.
If you do not have a USB SilverLink cable, you can use the mini USB to USB Direct cable but you will have to install the correct driver for it.

I do not know what computer operating system you are running and I use Windows XP so I will describe the installation procedure for Windows XP SP3.

Install TI connect 1.6 for Windows; if your system is Vista you must install a patch available on the TI website, at the same page where you find TI Connect.

After you install TI Connect, connect you calculator to the computer with the mini USB standard USB Direct cable. Windows will detect the calculator and will try to install the drivers. You will have something that is similar to what is on the three screen captures I am inserting in the post. On the last screen, choose the TI Educational Handheld device and click next.







When Windows asks to stop installation, click continue anyway


After the installation, click finish.

Device manager will show you something like what is on next screen (TI Educational Handheld device)

Run TI Connect to verify that the calculator is recognized. Connect your computer to the Internet and click the Updates Button on the TI Connect tool bar.

If you use the TI USB Silver Link cable there should not be any problem. In case of problems, download the latest TI connect software and install it anew.
But if you use the mini UsB to Standard USB Direct cable you will have to install manually the correct drivers.

Here is a copy of a post I wrote to answrer that question.

If you have a USB SilverLink cable, use it to connect the calculator though the I/O (round) port.
If you do not have a USB SilverLink cable, you can use the mini USB to USB Direct cable but you will have to install the correct driver for it.

I do not know what computer operating system you are running and I use Windows XP so I will describe the installation procedure for Windows XP SP3.

Install TI connect 1.6 for Windows; if your system is Vista you must install a patch available on the TI website, at the same page where you find TI Connect.

After you install TI Connect, connect you calculator to the computer with the mini USB standard USB Direct cable. Windows will detect the calculator and will try to install the drivers. You will have something that is similar to what is on the three screen captures I am inserting in the post. On the last screen, choose the TI Educational Handheld device and click next.







When Windows asks to stop installation, click continue anyway


After the installation, click finish.

Device manager will show you something like what is on next screen (TI Educational Handheld device)

Run TI Connect to verify that the calculator is recognized. Connect your computer to the Internet and click the Updates Button on the TI Connect tool bar.

The only option or keys that will work is the ENTER key and the arrow keys. Try to get your arrow key to work by arrowing down and hit enter hopefully change you to something different.
Next, if at all possible can you hit the MODE key or get into the mode. If you get into the MODE select F3 and then arrow down twice or all the way to the bottom and at APPS Desktop select 1:OFF and then hit the ENTER key. Next, What I really think you need to do is reinstall the Ti 89 OS software. To do so you would need to connect to your computer or another Ti 89 Titanium to your Ti 89 Titanium. If you have Ti connect computer software (from the Ti site) connected to your Ti 89 Titanium it might help you more in troubleshooting any further problems too. You might be able to delete corrupt files that would free your calculator up and start running better.