Question about Texas Instruments TI-85 Calculator

4 Answers

Dark screen? I borrowed this calculator from a friend and i switched over the lithium battery and the regular batteries to another ti85 that i wanted to see if it worked, so i switched the batteries back to the ti85 that i borrowed and i turned it on and its just a black square, but i can still see the cursor. please help.

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  • kiquali Dec 18, 2008

    I had the same problem and tried the tricks above and it didn't work for me either.

×

4 Answers

Press 2nd and let go then press the down arrow once.
again,
press 2nd and let go then press the down arrow once.
and so on and so forth.

Posted on Aug 05, 2008

Mine didn't work at first either (with panasonic batteries) then I tried duracel and it was fine

Posted on Aug 01, 2008

This doesnt work for mine

Posted on May 30, 2008

Press 2nd, hold the down key until the screen lightens up.

Posted on May 07, 2008

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1 Answer

Hmmmm...I'm pretty sure most TI users know about the dimming function of the calculator. So, Mr, Guru, why is my TI85 is not turning on even though I've installed brand new batteries in it (Both the AAA's...


Hi
In the TI85 this problem could be if you did not use the calculator for a long time. in this case the calculator need hardware reset.
if it will not help its an Hardware Failure
if you want to fix the Calculator let me know
ecrdn@yahoo.com

Jack

Oct 22, 2010 | Texas Instruments TI-85 Calculator

1 Answer

Screen is dark when turned on-already removed batteries and lithium battery-is ti-83


Adjust the screen contrast. Turn the calculator on. Press and release the 2ND key. Press and hold the down-arrow key to lighten the screen. If you go too far, press and release 2ND then press and hold up-arrow.

Sep 15, 2010 | 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 kid's calculator is not working; replaced new batteries including the lithium battery. yet, the calculator is not turning on.


After a battery replacement the screen contrast may become too dark or too light. I suspect that in your case the screen is too light. To darken it
Press [2nd] key and release it.
Press and HOLD [UpArrow] until screen darkens enough.

Jan 30, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

Calculator will not turn on. I have a texas instrument calculator TI85 that will not start. Any suggestions?


Hi,
The batteries may be depleted, and they need to be replaced. If abtteries are fresh and the calculator seems toi refuse to turn ON, the screen darkness must be increased before declaring that the calculator does not start. If screen is too light you won`t be able to see that calculator is already ON.

To increase the contrast.
  1. Press the [2nd] and release it.
  2. Press and HOLD the UpArrow key until you can see something on the screen.
  3. The screen may have about 10 levels of darkness
Hope it helps.
Thank you for using FixYa and for rating this solutions.

Nov 30, 2009 | Texas Instruments TI-85 Calculator

1 Answer

When I turn the switch on, ti-89 titanium does not turn on.


If you connect calculator to computer using Ti connect device explorer you might be able to see what files are on the calculator. I don't know if you downloaded from the web but, 3rd party programs and shells tent to miss up the calculator. This would able you to delete out possible problems which could be re installed later.

Sep 22, 2009 | Texas Instruments TI-89 Calculator

2 Answers

Black screen


Try adjusting the contrast. It may be too dark. Turn the calculator on press the 2nd key and the down arrow. This is how to adjust the contrast and will lighten the screen. You can darken the screen the same way, but use the up arrow instead.

Aug 25, 2009 | Texas Instruments TI-86 Calculator

1 Answer

TI85 will not work.


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 release the 2ND key. Press and hold the Up-arrow key for a few seconds and see whether the screen becomes legible.

May 26, 2009 | Texas Instruments TI-85 Calculator

1 Answer

Doest turn on.


It might be turning on but the screen may be to light. Try pressing on then darkening the screen by holding 2nd and the up arrow. If it works then you're welcome; if not then sorry i led you astray.

Mar 04, 2008 | Texas Instruments TI-85 Calculator

2 Answers

Blakck screen


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 20, 2008 | Texas Instruments TI-83 Plus Calculator

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