Question about Texas Instruments TI-85 Calculator

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TI85 will not work.

I wase gone for one week and when I returned, my TI85 calculator would not work. I replaced all batteries, bur it still will not turn on.

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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.

Posted on Mar 09, 2010

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Posted on Jan 02, 2017

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These three keys are not working on my TI85: "," "4" "5"


Calculator suffers from old age. Time to retire it.

Aug 16, 2014 | Office Equipment & Supplies

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Ti 85 wont turn on, batts good, tried to adj contrast , still nothing


Are you sure the batteries are in correctly? They alternate negative/positive, positive/ negative and so on. The first time I put the batteries in, I didn't have them in correctly. You tried adjusting the contrast. Just try adjusting upwards. Sometimes it takes a little for The Ti 85 to come on or adjust right. The Ti85 is an old calculator and, may not work any more. I had my Ti89 for almost 20 years so, they are pretty reliable. If nothing has worked take out all the batteries including the small one in the back. Texas Instruments say's " leave them out for 5 to 10 minutes." I had to leave mine out for over a 1/2 day to get it to work.

Here is the battery reset procedure for the Ti 85.

Try a new set of AAA batteries.
  1. Adjust the contrast by pressing and releasing the [2nd] key followed by pressing and releasing
    the up arrow; repeat as necessary. To adjust or lighten the display, use the down arrow.
  2. Remove one of the AAA batteries. Press and hold the [ON] key for 20 seconds. Reinsert the
    AAA battery and then turn the calculator on.
  3. Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute

  4. period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.

Just keep trying. Sometimes they can be a pain.

Dec 28, 2010 | Texas Instruments TI-85 Calculator

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

Numbers appear broken in the display


TI85 and TI86 have an issue with the screen if its not turn on for a long time
try to set focus all the way up and keep it for 10 to 15 min by clicking any button
sometimes it help

Oct 22, 2010 | Texas Instruments TI-85 Calculator

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

How copy and past on ti85


Try using the LINK85.EXE that came with the TI-85. http://education.ti.com/downloads/files/computer_software/link85.exe if you do not have it. You will also need the cable that came with the TI85. It connects to a serial port and the TI85. It runs in a DOS window that allows you to copy and program written on the TI85 to a pc and then converter to ASCII and back to the program and uploaded.

Mar 26, 2009 | Texas Instruments TI-85 Calculator

1 Answer

Ti85


kinda. The TI-85 programs differently, lacks a table feature, is not upgradable, has redefinable keys, has a larger screen, is smaller, energy efficient, TI-86 semi-compatible, and is older.
The TI-84+ has archive memory, flash-upgradable, FSTN (clearer) screen, 16*8 screen, USB On-The-Go compliant, almost a centimeter longer, assembly language support, and a tad bit faster.

TI-82: $89
TI-83 Plus: $79-99
Free TI-85: $0
TI-84 plus: $119.99
TI-84+SE: $129-139
TI-89 Titanium: $149

Sep 06, 2008 | Texas Instruments TI-85 Calculator

4 Answers

Dark screen?


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

May 07, 2008 | Texas Instruments TI-85 Calculator

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