Ti84 Plus Turns on, and turns off right away.

hi
press the clear key if this don' t work try finding the
the reset button in the back of the calculator or remove the batteries from it for one minute and put them back in and turn it back on again . if that fails than buy a new calculator because you got a defective calculator that some how got pass inspection.

I hope this helps

It may not be as bad as you think. The batteries were depleted and the calculator turned itself off due to lack of electric energy.
So you changed the batteries. However after you put new batteries, the screen did not appear to be alive. It may just be too dim.

1. Make sure batteries are good, and placed correctly (respect the polarity diagram)
2. Press ON button once ( or if you have the TI SilverLink cable, insert it in the IO port)
3. Press [2nd] key once
4. Press the [UPArrow] and hold pressure
5. The screen should start darkening.
6. As you keep pressure on the UP arrow, a number should appear on the top right corner of the screen.
7. Release the UpArrow key when screen contrast is adequate.
8. If you make it too dark, Reverse the process : [2nd] key and [DownArrow]

Hi purzabumafu8,

You need to re-install the Ti 84 Plus OS on both calculators, ASAP!!! You can fix these problems by installing the newest Ti 84 Plus 2.55v. MP OS, operating system. Use fresh batteries.

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 USB or, IO link ports. Then 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. Link the two calculator together through the USB or, IO link ports with the proper cable. If don't have another reliable calculator to connect too, you'll have to connect the calculator to a computer to download the OS, goto Procedure 5. If your downloading off another calculator goto Procedure 1.

Important Note: Never disconnect a TI Connectivity Cable during a transfer. Lost of power during installation of OS will destroy your calculator.

Procedure1. Procedure to linking to another calculator.
On their calculator press, [2nd][Link][G] [Right-Arrow]. On your calculator press, [2nd] [Link] [Right-Arrow] [Enter] and, then press [ENTER] on their calculator too. Their calculator should say, "TRANSMIT" and, your's will say "Receiving." Then on both calculators once transfer is complete press, [2nd][MODE] to quit and, return to the Home screen. If the OS was transferred then your finished with these procedures. If your calculator won't turn on or, is locked up try the Procedure 2, below.

Procedure 2.

Remove one of the AAA batteries. Press and hold the [DEL] key. While holding [DEL], reinsert the AAA battery and then turn the calculator on. The calculator should display
"Waiting...Please install calculator software now". If calculator did not turn on or, is still locked up goto Procedure 3, unless already did Procedure 3, then goto Procedure 4. If you calculator does come on and is responding and, your connect to another calculator goto Procedure 1. If you calculator does come on and is responding and, your connect to a computer goto Procedure 7.

Procedure 3.

Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary. Goto Procedure 2.

Procedure 4.

If the above process did not work. Try re-doing the Procedure 2, and, this time extend the time in Procedure 3, by 5 minutes to 10 minutes before you put all the batteries back in the calculator. These calculators can be a little stubborn at times so, keep trying Procedure 2.

Procedure 5.

If you can't find a calculator to connect too, 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.
Procedure 6. Procedure to installing the latest Ti84 Plus 2.55v. MP OS. TI OSDownloader does not always install the latest OS.
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. If your calculator will not turn on or, is locked up goto Procedure 2. Or else goto Procedure 7.

Procedure 7.
Important Note: Never disconnect a TI Connectivity Cable during a transfer. Lost of power during installation of OS will destroy your calculator.
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 mixedgamer12,
The process below should reset your Ti84 plus calculator. If you do this process your RAM memory will be cleared and, you will have to re-install the Ti84 plus calculator's OS.

1. Remove one of the AAA batteries. Press and hold the [CLEAR] key. While holding [CLEAR],
   reinsert the AAA battery and then turn the calculator on. The calculator should display the
   message "RAM Cleared". Release the [CLEAR] key and then press it one more time to remove the message.
   
2. Remove one of the AAA batteries. Press and hold the [DEL] key. While holding [DEL], reinsert the AAA battery and then turn the calculator on. The calculator should display
   "Waiting...Please install calculator software now". Follow the instructions for the
   TI-83 family or TI-84 Plus family to reinstall the calculator operating system in step 3. If the calculator still won't turn on connect the calculator to the computer and, open Ti Connect. Next, open Device Explorer. Is the calculator asking to be installed? Can you go into Device Explorer?
   
3. Steps to re-installing the operating system:
   

   ~Connect the TI Connectivity cable between the PC and the calculator if you haven't already.
   ~Click on Start >> Programs >> TI Tools >> TI Connect >> TI OSDownloader
   ~Follow the on-screen directions to reinstall the calculator's OS. When or, if the calculator install the fresh OS goto step 4.
   
   

4. Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.
   

5. If the above process did not work to turn your calculator on, try re-doing the above process. Next time extend the time in step 4 by 5 minutes to 10 minutes before you put all the batteries back in the calculator.
   

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 release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

If that doesn't do it, please add a comment to this post and we'll go on from there.

It is possible that it is turned ON but you cannot see what is on the display because the screen is too dim. That often happens after you change batteries.
To make the screen darker

1. Press the [2nd] key and release it.
2. Press the [UpArrow] key and HOLD it pressed until the screen darkens to your liking.

Hello,
The Texas Instruments FAQ area of their web site has on such question answered. You may want to read the relevant article. Scroll down the page and look for the part on the TI83/TI84 Plus family.
Hope you will find the answer to your calculator's woes.

If you open the battery case and then open the lithium battery case (with a screw driver), there is a "reset" hole inside the lithium battery case area. Use a small screwdriver or something that will reach inside the reset hole and press. Good luck!

Maybe the batteries are dead?

change the batteries