Question about Texas Instruments TI-85 Calculator

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How?? When I changed the batteries and tried to turn it on it wouldnt come on how do i fix it ??

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When you change your batteries the contrast is automatically set back to zero. You have to readjust your contrast by pressing 2nd up or down (they look like triangles).

Posted on Jan 08, 2009

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Make sure batteries are entered in the right way.
make sure the ions are not eroded.
moving the batteries around sometimes make its work

Posted on Dec 23, 2008

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My calculator keeps showing the number 1 and is completely frozen. I can't clear it or turn it off. I've tried replacing the batteries and it's not working. Help!!!


There should be a backup battery in the calculator that you can remove also. This battery keeps power to the calculator when the main batteries are removed so that information doesn't get lost while you change them. Try taking this battery out for a second along with the main batteries and that might fix your issue.

Jun 12, 2015 | Texas Instruments Texas Instuments TI-89...

1 Answer

It wouldnt turn on new batteries are in it. Screen funny


Is the screen funny like it's telling jokes? Or is it falling down funny? Im not sure, but if its dimly lit funny or too dark funny try this: hit the second key and then hold down up. This will darken the screen. If its too darkthen hit the second key and the press down.
Good Luck; Wish my calculator had a sense of humor.

Jun 21, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

TI-84 Calc is FROZEN


I'd try hooking it to the computer using ti connect explorer and see if deleting the programs there would help. I had a calculator that did the same thing and never did fix it. But if your memory can be delete and reinstalled it might work.

Aug 30, 2009 | Texas Instruments TI-84 Plus Silver...

2 Answers

A friend gave me a TI-86 graphing Calc. I wont turn on!!!


maybe try changing the small memory battery inside, I think its a cr1616 or cr1620. If this doesn't work use it as a paperweight.

Apr 23, 2009 | Texas Instruments TI-86 Calculator

4 Answers

Screen fully black


Black-Screen/Black-Pixel Fix for TI-Calculator

This will erase all memory and reset defaults.

1. Remove 1 AAA Battery
2. Press and Hold 'ON' for 30 seconds
3. Replace AAA Battery
4. Adjust Contrast to appropriate level

If this fails, try again with ALL Batteries removed including
the backup Lithium Battery.

If all else fails, try the following reset procedure:

1. Remove ALL Batteries (inc. Backup)
2. Let Calculator sit with no batteries for 2~4 hours.
3. Hold 'ON' for 30 seconds.
4. Replace all the batteries (May be good idea to use new batteries
just in case old ones were dead)
5. Turn on Calculator
6. Change Contrast to appropriate level

- Remember to use correct batteries or calculator may not work. The
correct batteries are Alkaline, Rechargable Batteries are TOO WEAK,
Heavy Duty batteries are TOO STRONG.

Oct 09, 2008 | Texas Instruments TI-89 Calculator

3 Answers

Ti-84 plus


this might seem weird.... but have you checked the brightness of your calculator? if someone was playing with it and set the brightness to 0 it wont seem like there is anything. if u press second then hold the up arrow key it will make the screen darker. I dont know if this will help you or not but i know some of my friends like to play pranks where they set the brightness really high.

Sep 24, 2008 | Texas Instruments TI-84 Plus Calculator

1 Answer

TI-83 Plus silver edition won't turn on.


the screen may be at the lowest dim setting, try turning it on, then pressing the 2nd key and then hold the up key and see if anything appears, if not let me know and I will try to figure out something else, I own a 83, 84, and 89 so it shouldn't be too hard to figure out

Mar 16, 2008 | Texas Instruments TI-83 Plus Calculator

1 Answer

Want turn on


not a fun problem to fix, as i am trying to fix it right now. try taking out one battery and then holding in [DEL] for about 5 seconds before replacing the battery. then connect it to your computer and reloas the opperating system from TI's website. load it onto your calculator and hopefully you will have a functioning calculator

Sep 18, 2007 | Texas Instruments TI-84 Plus Silver...

3 Answers

My ti89 titanium doesn't turn on


I had the same problem. I changed the batteries and it didn't work. I took out the batteries for about 30 minutes, and then put them back in, and it turned on.

Aug 21, 2007 | Texas Instruments TI-89 Calculator

2 Answers

TI 83 Plus Calculator


You can try to turn the contrast down by pressing 2nd and then hold "down" If the screen does not fix, put new batteries in (including the back up batteries). The problem will be resolved. Hope this helps...

Aug 18, 2007 | Texas Instruments TI-89 Calculator

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