iFixit - Answers With Device "TI-84 Plus CE"

TI-84 Plus CE: TI-84 Plus CE My calculator says: Validing OS calculator will restart

Wed, 16 Jul 2025 07:16:06 -0700

My calculator says:

Validing OS

calculator will restart when validation complete. And starts blinking over and over again and I cannot fix it, I tried to charge or reset it and It doesn´t work.

⟐ Commented July 16, 2025 at 7:16 MST

TI-84 Plus CE: How to replace screen glass?

Thu, 07 Sep 2023 04:31:13 -0700

Hello. I have a TI 84 Plus CE that has just been sitting in my backpack for the last couple of months (in hindsight wasn’t my best idea.) I took it out of my pack one day and found out the screen was cracked (pic below.) Is there any guide to fix it? The panel itself is not broken but the glass separating them is. Thanks!

⟐ Answer accepted September 07, 2023 at 4:31 MST

TI-84 Plus CE: My calculator doesn't turn on anymore

Tue, 21 Jan 2020 02:25:02 -0700

My calculator stopped working out of no where. It doesn’t turn on no matter what I do. When i plug it in the orange light indicates it is charging. It will turn green after a while indicating it is fully charged. But when i plug it out and plug it in immidiatly after it goes through the same process again. It just doesn’s seem to charge. Does anyone know if there is a fix for this problem?

⟐ Answer accepted January 21, 2020 at 2:25 MST

TI-84 Plus CE: Why wont my TI84 plus CE turn on at all?

Tue, 21 Jan 2020 02:21:51 -0700

The calculator is plugged in and the light on the side is glowing orange, but the screen is black like it is off and doesnt change whatsoever

⟐ Answer accepted January 21, 2020 at 2:21 MST

TI-84 Plus CE: Why my charging light is always on? It kills the battery.

Fri, 19 Nov 2021 08:49:10 -0700

Last night after I unplugged my calculator, I found out the charging light was still on and it couldn't be turned off. The light is on all day today, and it really kills the battery, so by the end of today I have to recharge it . I tried to reset and remove the battery, but these methods didn't help. So I wonder what is wrong with my calc, should I get a new one or should i just get a new battery? Is there anyway i can do to save it? Help S.O.S. Thank you!

update: Thanks for all the help.

I changed to a new battery and updated my OS, but the charging light is still on and it really kills the battery life. Usually the ti-calculator can stand for at least 2 weeks, now I have to charge it every 12 hours. I would really like to know is there another way to fix it? Thanks!

⟐ Commented November 19, 2021 at 8:49 MST

TI-84 Plus CE: Why won't my Ti84 Plus CE turn on?

Tue, 21 Jan 2020 02:24:19 -0700

My calculator will not turn on despite being at full battery (when it charges it has a green light). The screen does not turn on when I press the on button, instead it stays black. I have even bought a replacement battery online, but this did not seem to help. Before, my calculator would often not turn from time to time, but still turned on occasionally, and it always turned on after a few seconds of charging it, but now it does not.

⟐ Answer accepted January 21, 2020 at 2:24 MST

TI-84 Plus CE: The Screen stays white with no display even when fully charged.

Thu, 07 Sep 2023 04:31:00 -0700

My calculator was working fine, until one day the screen would not show anything else but an all white screen with non of the features present.

⟐ Answer accepted September 07, 2023 at 4:31 MST

TI-84 Plus CE: Is it possible to increase the ram on the ti-84 plus ce

Mon, 08 Jun 2020 18:15:56 -0700

is it possible to solder better ram on my ti-84 plus ce , i have good slodering skills , and i looked up the processor and it says the speed will increase with more ram up to 150mhz

⟐ Answer deleted June 08, 2020 at 18:15 MST

TI-84 Plus CE: The calculator won’t work

Wed, 16 Jul 2025 06:38:33 -0700

It brand new just got it. I plugged it in and screen turned on but says something and turns off.

⟐ Commented July 16, 2025 at 6:38 MST

TI-84 Plus CE: Why is my calculator flashing validating OS

Tue, 12 Mar 2024 14:04:48 -0700

Why is my Calculator flashing validating OS

⟐ Answered March 12, 2024 at 14:04 MST

TI-84 Plus CE: How do I remove dust particles on top of the LCD screen?

Thu, 07 Sep 2023 04:30:41 -0700

How can I disassemble the device to clean the LCD screen?

⟐ Answer accepted September 07, 2023 at 4:30 MST

TI-84 Plus CE: Is there a way to fix buttons that aren't working?

Tue, 28 Apr 2020 00:45:04 -0700

The bottom row of numbers on my TI-84 (1, 2, and 3) have stopped working and do not input a number when pressed. Is there a way to fix this or someone I could send the calculator to in order to have it fixed?

⟐ Answer accepted April 28, 2020 at 0:45 MST

TI-84 Plus CE: How can I fix my flashing screen (TI-84+CE)

Mon, 14 Oct 2019 19:03:55 -0700

My calculator seems to have decided to no longer likes me, and is having startup issues.

It is stuck on a flickering white screen. I can’t turn it off. It doesn’t seem to be turning off on its own. I’d prefer to not have to completely wait for it to drain considering that I just finished charging it yesterday. The calculator does not seem to fully load at all and does not appear in the TI Connect CE program when plugged in to the computer. This is my personal calculator and I’d really like to have it fully working again, and if possible, salvage the programs I have on it. Is there anything I can do, short of buying a new calculator? Or is there a factory reset feature available anywhere I can use?

⟐ Comment deleted October 14, 2019 at 19:03 MST

TI-84 Plus CE: Why is part of my screen black?

Tue, 19 Feb 2019 20:02:27 -0700

Part of my screen is black-blocking numbers-, what is the problem and how can i fix it?

⟐ Answer accepted February 19, 2019 at 20:02 MST

TI-84 Plus CE: How can I buff out light scratches from the outside screen?

Sun, 06 Oct 2024 16:48:45 -0700

Someone gave me this calculator for my daughter. I was cleaning it and I really should have researched first but I didn’t. I used a Q-tip dipped in alcohol and rubbed all over including the screen. I didn’t notice if these scratches were already there or if I caused them but I would love to get them out. I don’t think they’re actual scratches because there’s no feel to them. They look more like when you take your finger nail and run it across the screen it leaves a light mark. I tried toothpaste but that didn’t work.

⟐ Answered October 06, 2024 at 16:48 MST

TI-84 Plus CE: TI-84 Plus CE repeatedly turning on and off when charging.

Thu, 06 Jun 2024 18:43:01 -0700

My TI-84 Plus CE will repeatedly turn on and off repeatedly in about 1 second intervals while connected to the charging cable, regardless of the power source its connected to (wall outlet, laptop, power brick etc.). It will not turn on at all if not plugged in. I've tried pressing the reset button to no avail. The cable is essentially brand new. This also happened while it should have been at full charge, though it had been about 2 months since it was last fully charged, but it wasn't used in that time until I tried to turn it on recently. I tried taking the battery out and putting back in, and that didn't make a difference either.

⟐ Commented June 06, 2024 at 18:43 MST

TI-84 Plus CE: My calculator is not charging or turning on

Wed, 01 May 2024 19:43:38 -0700

Hi, I just got my calculator (TI-84 plus CE) in the mail and it wasn’t turning on so I plugged it in using the USB cable provided that says it’s for “data transfer and convenient charging”. I am worried because the screen is flashing with a message that says “calculator will restart when validation is complete” so it doesn’t seem to be charging. It’s still not turning on and I have no idea what to do, please help. (This calculator doesn’t have a light on the side so I am unable to see if it is charging or what the battery percentage looks like)

⟐ Answered May 01, 2024 at 19:43 MST

TI-84 Plus CE: My calculator won’t turn on at all!

Tue, 21 Jan 2020 02:25:51 -0700

It stopped working a while ago, I thought I just needed to buy a new battery, so I did, but nothing happened. When I plug it in, the light turns green, and I’ve pressed the reset button a bunch, but the screen never turns on. Please help

⟐ Answer accepted January 21, 2020 at 2:25 MST

TI-84 Plus CE: Why does my calculator not change from a white screen

Wed, 12 Dec 2018 17:54:39 -0700

I was using one of my programs and my screen just went blank and has stayed that way. I have used numerous different methods such as holding the 2nd button, delete and On, but the screen has stayed the same. I was wondering if there is anything left that I should try ?

⟐ Answered December 12, 2018 at 17:54 MST

TI-84 Plus CE: My alpha key is no longer Functioning

Mon, 29 Sep 2025 00:46:58 -0700

The alpha key in my Ti-84 plus CE is not working i have looked everywhere on how to fix it i could not find anything about it. I did open it up however i was scared to go any further because it seemed the everything is attached to the front black face piece . I just need a little guidance. (Everything else works great)

⟐ Commented September 29, 2025 at 0:46 MST