iFixit - Answers With Device "TI-84 Plus"

TI-84 Plus: My calculator turns on but unresponsive to the keyboard.

Fri, 03 Oct 2025 12:51:07 -0700

My Ti-84 turns on but when i press the keyboard its unresponsive. The cursor just keeps flashing and the none of the buttons work.

⟐ Marked as duplicate October 03, 2025 at 12:51 MST

TI-84 Plus: Calculator randomly turning OFF

Fri, 03 Apr 2020 13:44:33 -0700

My calculator, out of nowhere started turning itself off randomly and resetting the RAM constantly. Sometimes I can turn it ON and use it for a few minute but other times if I just touch it or press any key it will immediately turn off. I have tried changing both batteries and didn’t work. What else should I do? Any idea of what might be?

⟐ Answer edited April 03, 2020 at 13:44 MST

TI-84 Plus: Unable to access F1-F5 menus despite all other alpha functions working

Wed, 02 Oct 2024 11:04:51 -0700

While I was trying to solve a logarithmic question, I tried to find the logBase( operation via pressing [ALPHA] > [WINDOW], however doing that only leads me to the Window screen and not the F2 screen as I had hoped.

I tried the same thing with the other function menus, and the result was the same thing for each and every button on the top row. All other alpha functions work, I can still type in the alphabet along with the other special characters available when you press the alpha button, I just can’t access the F1-F5 menus. This calculator is on firmware version 2.43, so I believe it’s not firmware related. It has some applications installed from the time that my dad used this calculator in college, however I doubt that any of them would interfere with my ability to access the F1-F5 menus.

I made a quick video to go along with this just in case if my question doesn’t make sense.

⟐ Commented October 02, 2024 at 11:04 MST

TI-84 Plus: TI 84 Calculator got wet from water. Won't turn on.

Thu, 25 May 2017 05:06:33 -0700

Changed batteries but won't turn on. What can I do?

⟐ Answer accepted May 25, 2017 at 5:06 MST

TI-84 Plus: The Alpha key used to create fraction will not respond when in Y=

Mon, 18 Aug 2025 20:13:35 -0700

The alpha key es not respond when in the Y= ? How do I fix this?

⟐ Commented August 18, 2025 at 20:13 MST

TI-84 Plus: Arrow Keys don't scroll through previous calculations

Sun, 28 May 2023 09:58:29 -0700

The "normal" behavior of the arrow keys is to scroll up and down through previous questions and answers, but my calculator's ones act like the "home" and "end" keys. I've tried multiple factory/default resets and it still doesn't change.

⟐ Answer accepted May 28, 2023 at 9:58 MST

TI-84 Plus: Why does TI-84 Plus says Press Alpha F1-F4 to locate shortcut menus?

Tue, 31 Aug 2021 07:40:23 -0700

TI-84 Plus says Press Alpha F1-F4 to locate shortcut menus and can’t see the bottom portion of screen.

⟐ Answered August 31, 2021 at 7:40 MST

TI-84 Plus: How long of a screwdriver do I need to open this calculator?

Wed, 27 Feb 2019 12:47:11 -0700

This is a “new to me” calculator I just got. The reason I need to open it is there was a prior battery leak , as I have found some evidence of :-(. This isn’t a deal breaker for me because it looks like it was cleaned well, but I want to open it to see if there is board damage. It’s been working fine for years as far as I know, but it’s better if I open it and make sure myself. It’s probably okay, but it’s more so I have closure on the state of the board itself. I already replaced the backup battery (LR44) as a precaution because it came with the original NL battery TI uses.

I tried using my old style 64-bit driver kit to get in (it needs a T6 Torx) and it’s too short. As such, I need to know if I specifically need a standalone driver to get in or I can get away with a bit set with the right length. I figure the calculator experts here can tell me if I can get away with long driver bits or if I’m stuck without a standalone driver.

Hopefully this helps, but here’s a photo of the length I’m dealing with:

I’ve never worked on a calculator as I’ve always had disposable ones like the TI-30X IIS (and many, many 4 function ones), so I’m not clueless but I’m also not armed with all the information I would prefer having as I’m about to open a $100+ calculator.

The good news is the leak didn't affect anything. It's only cosmetic and the board survived. Just needed a good cleaning :-).

⟐ Edited by author February 27, 2019 at 12:47 MST

TI-84 Plus: Will this operate without batteries?

Sat, 09 Sep 2023 07:20:11 -0700

Received the calculator from someone for my granddaughter. No user guide or charging cord. I happened to have the correct cord from another TI calculator. I have no idea how to use the device but my question is can the calculator be used by being charged with that cord alone and with no AAA batteries inside? Also, should there be a light to show the device is charging? I’ve been charging the device for about an hour, no batteries inside, and no light comes on. Tried to turn on but didn’t come on. Thank you.

⟐ Commented September 09, 2023 at 7:20 MST

TI-84 Plus: Screen has black dots on it.

Tue, 18 Apr 2023 08:36:55 -0700

The screen has two black dots that I can’t remove, the calculator works fine so I think it is a screen problem.

The black dots are more clear in person.

⟐ Answer accepted April 18, 2023 at 8:36 MST

TI-84 Plus: Fix battery spring on calculator

Wed, 01 Mar 2023 11:00:07 -0700

I have a calculator that had been working well but the batteries rotted inside. Taking them out one of the springs came undone. Is this fixable?

⟐ Answer edited March 01, 2023 at 11:00 MST

TI-84 Plus: Why is a row of buttons on my TI 84 plus not working?

Tue, 12 May 2020 16:36:11 -0700

I’ve got a TI 84 Plus in good condition; the only problem is that not all of the buttons work. Specifically the buttons that aren’t working are the “log”, “7”, ”8”, “9”, “x (multiply)”, and the Up button on the keypad. The first 5 of these buttons are in a row straight across the keypad. I’ve tried cleaning the key mat and the big green motherboard, still nothing. There was some yellow gunk on the board when I cleaned, there might have been a battery leak at some point maybe? Any help would be very much appreciated!

⟐ Answered May 12, 2020 at 16:36 MST

TI-84 Plus: Why does my TI-84 plus calculator say RAM cleared?

Sat, 11 Nov 2017 07:54:37 -0700

When turning on my calculator, the screen displays "RAM cleared" and "press alpha F1-F4 to locate shortcut menus." After pressing alpha F1-F4 there is no change in the display and none of the buttons appear to work or change the display. The only way to get the display off is to pull out the battery :( Any ideas on how to fix this?

⟐ Answer accepted November 11, 2017 at 7:54 MST

TI-84 Plus: Vertical Lines Through Numbers

Wed, 01 Jun 2022 12:53:40 -0700

I have vertical lines on the numbers and some of the screens on my TI84 plus. I tried doing a reset, took the batteries out. It only appears when I start typing.

⟐ Commented June 01, 2022 at 12:53 MST

TI-84 Plus: My calculator has a burned hole in it. How can I fix?

Tue, 01 Oct 2019 11:08:14 -0700

It got stabbed by a compass (the math measuring one in my bag) but the strangest thing is that it seems to have burned a larger hole around it. Is there a way to replace some parts in it or get someone else to fx it?

⟐ Commented October 01, 2019 at 11:08 MST

TI-84 Plus: it is not powering up

Sat, 04 Apr 2020 20:23:48 -0700

does not come on when on button is engaged

⟐ Answer accepted April 04, 2020 at 20:23 MST

TI-84 Plus: My screen is hard to see when looking straight at it

Tue, 05 Mar 2019 17:14:00 -0700

If I am in a lit room I can’t read my screen when looking straight at it. I have to look at it from an angle. It looks like there is a dark circle covering the screen but it’s not there when the screen is off

⟐ Answer edited March 05, 2019 at 17:14 MST

TI-84 Plus: My buttons are not working

Fri, 03 Oct 2025 12:51:07 -0700

No button work except on

⟐ Marked as duplicate October 03, 2025 at 12:51 MST

TI-84 Plus: My calculator will not turn on

Sun, 11 May 2025 15:37:43 -0700

My calculator kept saying low battery every time i would turn it on, but during one of my exams it turned off and ever since it has not turned on.

I have tried charging it, when I plug it in nothing displays on the screen same for when I replaced all the AAA batteries.

⟐ Answered May 11, 2025 at 15:37 MST

TI-84 Plus: Line of keys not working.

Thu, 16 Jan 2025 12:39:45 -0700

I've had my calculator for years and use it frequently. Today, an area of keys - specifically "0", "1", "4", "7", ",", "sin", "apps", "x^2", "(", ")" stopped working. All other keys work fine. I've tried restarting, system reset, and changing batteries. I don't know if it's possible water damage (I have cats) or something else.

⟐ Answered January 16, 2025 at 12:39 MST