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Introduction

Most issues will be fixed with at least one of these steps, however they may end up erasing data in your calculator's RAM and/or ROM. To prevent data loss, backup your calculator to your computer or Archive any important information.

Please note that each step is its own solution. You do not need to perform every step if your calculator starts working again.

Parts

No parts specified.

Video Overview

  1. Some problems can be fixed simply by powercycling. Press [2nd] Press [on]
    • Some problems can be fixed simply by powercycling.

    • Press [2nd]

    • Press [on]

    • The calculator should now be turned off.

    • Press [on] to turn it back on.

  2. This will clear all information stored in the RAM! Information stored in the Archive will be safe. Remove the slide case and turn your calculator on its back.
    • This will clear all information stored in the RAM!

    • Information stored in the Archive will be safe.

    • Remove the slide case and turn your calculator on its back.

    • Take a pencil or thin object and press and hold the 'reset' button on the back of the calculator for at least 2 seconds, then release.

    • After a second or two, your calculator should say "RAM Cleared".

  3. This will clear all information in the RAM! Information stored in the Archive will be safe. Refer to this guide for instructions on how to remove the battery.
    • This will clear all information in the RAM!

    • Information stored in the Archive will be safe.

    • Refer to this guide for instructions on how to remove the battery.

    • Reinsert the battery after a few seconds.

    • Your calculator should automatically turn on and display a "RAM Cleared" screen.

  4. This will clear all information stored in the RAM! This could erase information stored in the Archive! Backup your information to your computer or another calculator if you want to save information.
    • This will clear all information stored in the RAM!

    • This could erase information stored in the Archive!

    • Backup your information to your computer or another calculator if you want to save information.

    • Install TI Connect CE. (If you already have it installed, you can skip this step)

    • If you are running either MacOS or Windows, go to TI's website and download TI Connect CE.

    • If you are running Linux, install TiLP.

    • Open TI Connect CE.

    • Connect your calculator to your computer via a USB to mini USB adapter.

  5. All warnings from Part 1 still apply. Press and hold [2nd] and [del]. Turn the calculator over; press and release the 'reset' button.
    • All warnings from Part 1 still apply.

    • Press and hold [2nd] and [del].

    • Turn the calculator over; press and release the 'reset' button.

    • Keep holding down [2nd] and [del]!

    • If you did it correctly, you will see a 'Install OS now' screen. If you do not see this screen, try again.

    • Once you see this screen, you can release [2nd] and [del].

  6. All warnings from Part 1 still apply. Download the most recent OS from TI's website. In TI Connect CE, click on 'Actions', then 'send OS/Bundle to calculators...'
    • All warnings from Part 1 still apply.

    • Download the most recent OS from TI's website.

    • In TI Connect CE, click on 'Actions', then 'send OS/Bundle to calculators...'

    • Navigate to where you saved the OS and select it.

    • Wait for it to load, then click 'send'.

    • This will take a few minutes.

  7. DO NOT UNPLUG THE CABLE DURING TRANSFER! You risk damaging your calculator! All warnings from Part 1 still apply. Wait for the OS to send and verify.
    • DO NOT UNPLUG THE CABLE DURING TRANSFER! You risk damaging your calculator!

    • All warnings from Part 1 still apply.

    • Wait for the OS to send and verify.

    • Once finished, you should see a 'RAM cleared' screen. Your calculator is now finished installing the OS.

Conclusion

Your calculator should now be functioning.

If it is still having issues, contact Texas Instruments support at:

Email: ti-cares@ti.com

or

Call: 1-800-TI-CARES (toll free)

4 other people completed this guide.

TheLastMillennial

Member since: 07/18/2018

1,095 Reputation

2 Guides authored

6 Comments

My calculator has not turned on for the past week. I have tried multiple USB cables and power sources, a (charged, working) battery, the On+Ac+Reset trick, and all of the techniques mentioned in this guide. The calculator still displays nothing on the screen, and windows, Ubuntu Linux, and MacOS all refuse to recognize the calculator. Drivers can’t be installed, and I even attempted a jerry-rigged USB connection using a few alligator clips (bypassing the usb connector in the calculator). Any advice? I’ll take any at this point.

Owen Sayre - Reply

@the_pimaster Ok, just checking, you do have a TI-84 Plus CE? There are similar calculators out there that have different key combos. Also, what do you mean by On+Ac+Reset? The correct combination is [2nd]+[del]+Reset. I’m surprised the computer doesn’t even recognize the calculator is connected, does the LED by the USB port turn on when you connect it to power? If so, what color?

What were you doing when the calculator was last working? Did you accidentally spill something on it, drop it, or crush it?

TheLastMillennial - Reply

@thelastmill Thanks for the quick response! Yes, it is definitely a TI-84 Plus CE. I just tried the 2nd+Del+Reset combo you mentioned, but still no response. Something interesting— The calculator is not showing up in Windows’ device manager nor in driver installation menus (“Unknown USB Device”) but unplugging/re-plugging or hitting the reset button triggers the “new device” sound in Windows 10. When I first plugged in the Calc, the Light by the charging port lit up red. After 2-ish hours charging, it is now green— I am aware that the battery/charging circuit is seperate from the calculator itself, which may be the source of this issue. The calculator was working last week during a math test, during which the screen turned black. The battery was charged to ~80% at the time, and the device was sitting on a desk— no physical damage occurred, and the calculator is only around a year old.

Owen Sayre - Reply

@the_pimaster Sorry it took a lot longer for this one. I’ve been asking some of my friends about this and unfortunately I think your best bet is to contact TI. I’ve never seen a calculator just… die like that before and it’s quite confused me; if I find a solution I’ll be sure to notify you. For now though you can email them at: ti-cares@ti.com or call 1-800-TI-CARES (toll free). I apologize I wasn’t able to help you with this, if TI somehow gets it working again, please inform me how they did it!

TheLastMillennial - Reply

So I have an issue, my calculator has had its battery light charger indicator on forever until it dies, that was 4 months ago. Since then I have been constantly having to charge it when I use it since the battery lasts for 2.5 hours off a single charge, but unfortunately, the darn thing would not turn on last night. I have tried every cable, nothing works.

Now for my what I think happened was that I used the wrong wall plug which destroyed the capacitor. Any advice?

Infinite Axel - Reply

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