Question about Texas Instruments TI-89 Calculator

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The calculator will not turn on. I have bought new batteries and also a new lithium backup battery. Still does not work.

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  • kakima Oct 03, 2010

    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 hold the diamond key. Press and hold the + key for a few seconds and see whether the screen becomes legible. If you go too far, use the diamond and - keys.

    Does this do any good?

  • sjlangley Oct 04, 2010

    Ok i did that and managed to get it to turn on. But when it turns on all it does is have a blank dark box. It seems that there is nothing on the calculator. What can i do?

  • kakima Oct 04, 2010

    I assume the screen isn't completely dark simply because you darkened it too far with the diamond/ combo. If so, lighten it with the diamond/- combo as originally described. Otherwise, press and hold the 2ND, left-arrow, and right-arrow keys, then press and release the ON key. Does this do anything?

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Having received no response in over five months, I assume my suggestion to reset the calculator solved the problem.

Posted on Mar 28, 2011

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1 Answer

Why doesn't it recognize the correct battery?


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Dead Battery?


Take out the batteries. Also take out the backup battery. It is a button battery beneath the screw in the battery compartment. Check the button battery volts with a multi-meter. After 5 minutes put the button battery back in and then the fresh batteries. It might work now. Alternatively take out a battery, then hold the clear button and put the battery back in. Then try to turn on. If it still does not work take out a battery press the del button and put the battery back in.

Feb 06, 2014 | Texas Instruments TI-83 Plus Calculator

1 Answer

My TI-83 PLUS wont turn on


Remove one battery from the calculator and then press and hold down the CLEAR key while re-installing the battery. While continuing to hold down the CLEAR key, press and hold down the ON key. If this doesn't work, then hold DEL and then ON. If unsuccessful, remove all the batteries, including the lithium watch battery, and leave the calculator like that for a while.

This is documented in the TI-83 Plus Guidebook, but unfortunately, not many people know about it.


If that doesn't work, send it to TI for repair. They probably won't even charge you!

Mar 20, 2017 | Texas Instruments TI-83 Plus Calculator

1 Answer

How do I get the Lithium Battery out?


Turn the calculator over. Press down on the latch and then lift up the battery compartment cover. Use a small screwdriver to unscrew the backup battery cover, then lift the cover off. This cover has a tab on the right end (away from the screw) that slides under the case. If you can't get it off after unscrewing, turn the calculator over and knock it against your palm.
Now you'll see the backup battery (the round thing) in a circular compartment with a long slot leading to it from the right. Insert the screwdriver or a thin knitting needle or similar object into the slot, putting the end under the battery, then pry the battery up and out.
To put the new battery in, you'll have to tilt it almost vertically to get it under the tabs on the left and then push to get it flat.

Dec 07, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I have a TI-83 graphing calculator and it keeps reporting 'Low Battery'. We replaced the 4 AAA batteries with a fresh set and got the same message. The calculator is less than 2 yrs old. Do I need to...


There can be two causes to this problem. One, the batteries that you put in may be expired. Some batteries have expiration dates on them (i.e. Duracell). If the year on it has expired or is coming near to expiring, you may have to put newer batteries in there that are longer lasting in years. Even if the expiration year is far-off, you still may need to put newer batteries in the bay. Two, your hypothesis of changing the lithium battery are correct. I read in the manual that you should change it every 3 or 4 years. The lithium battery is the back-up battery and it is like a memory card for you calculator. Whenever you put a new fresh set of batteries in the bay, the lithium battery saves your information while you are inserting the batteries in the bay. When you turn on the calculator again, it saves your functions that you've had in there. Hope this clears up your confusion! Reply back if you are still seeing the message.

Jan 15, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

I put new lithium triple aaa batteries in my TI-83. Nothing happened . days later it turned on worked for a little while then stopped. would it help to change the round lithium battery? Do you know what...


The button cell backup battery keeps the memory electrically refreshed when the calculator is turned OFF. The necessary power for regular use is supplied by the 4 AAA batteries (main power). That nothing happened when you put in a fresh set of (expensive) lithium batteries may be due to the screen being too dim to see anything.

If the calculator displays RAM CLEARED each time it is turned on, it may be due to a depleted backup battery. The battery model number is CR1616 or CR1620. On my TI84PLUS the backup battery is of type 303 (Sony) or SR44SW (Maxell).

Sep 05, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

My TI-84 won't turn on. If I replace the


Remove all four AAA batteries. Press and hold down the ON key for at least ten seconds. Replace the batteries. Turn the calculator on.

May 15, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

Do i need both the back up lithium battery and the 4 AAA batteries for my TI-83 calculator to work? Or can it work only with the 4 AAA?


The calculator can work with just the AAA batteries. But, without the backup battery, you'll lose all the contents of memory when the AAAs die. The backup battery is intended to keep the contents refreshed while you replace the AAAs.

Feb 06, 2010 | Texas Instruments TI-89 Calculator

4 Answers

TI-83 Plus Problem


Batteries:
Make sure to replace the "battery backup" too the little lithium ion battery

Try Adjusting contrast:
Hold down "[2nd]" key press up or down arrow repeatedly to lighten or darken contrast.

First attempt reseting:
Step 1: Remove all the batteries
Step 2: Hold "Clear" key down
Step 3: Still holding "Clear" key reinstall batteries
Step 4: Still holding "Clear" key press "On" key until home screen is displayed.

Second shot reseting:
remove all batteries including lithium ion (backup battery), wait 3 hours and reinstall batteries.

Third Shot reseting:
Step 1: Remove a battery
Step 2: Hold down "DEL" key reinstall battery
Step 3: Possible msg pops up saying "Waiting ... Please install software" IGNORE msg and take out battery again
Step 4: Reinstall battery do not hold down "DEL" key

reseting will cause the handheld to loose all of its stored memory.

Hope that helps!

Jan 29, 2008 | Texas Instruments TI-83 Plus Calculator

1 Answer

Black screen


If one of these solutions doesnt work you will most likely need to purchase a new calculator.

Batteries:
Make sure to replace the "battery backup" too the little lithium ion battery

Try Adjusting contrast:
Hold down "[2nd]" key press up or down arrow repeatedly to lighten or darken contrast.

First attempt reseting:
Step 1: Remove all the batteries
Step 2: Hold "Clear" key down
Step 3: Still holding "Clear" key reinstall batteries
Step 4: Still holding "Clear" key press "On" key until home screen is displayed.

Second shot reseting:
remove all batteries including lithium ion (backup battery), wait 3 hours and reinstall batteries.

Third Shot reseting:
Step 1: Remove a battery
Step 2: Hold down "DEL" key reinstall battery
Step 3: Possible msg pops up saying "Waiting ... Please install software" IGNORE msg and take out battery again
Step 4: Reinstall battery do not hold down "DEL" key

reseting will cause the handheld to loose all of its stored memory.

Hope that helps!

Jan 12, 2008 | Texas Instruments TI-83 Plus Calculator

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