Question about Texas Instruments TI-85 Calculator

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Help my TI-85 keeps on resetting. i had some cool progs on it. Now they're gone.

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Finally!

We have a fault with the TI-85 people are asking me how to make a square root and stuff!

You are going to have to reset it yourself and put new batteries in it.

Hope this helps - Josh Howard

Posted on Feb 02, 2008

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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

2 Answers

Would not power up.


Having gone over a month with no response, I assume this is no longer a problem.

Apr 26, 2010 | Texas Instruments TI-85 Calculator

4 Answers

TI-85 manual


I have the original TI-85 Graphics Calculator Guidebook (quite thick), but I no longer own the calculator. You are welcome to have it, since I was just about to throw it away. If you want it, please e-mail me at: srairigh@iserv.net within the next week, as I'd like to get it off my desk. Thanks! -- Sandy

Aug 13, 2008 | Texas Instruments TI-85 Calculator

3 Answers

Ti-85


It cant make a table. Sorry!

Feb 02, 2008 | Texas Instruments TI-85 Calculator

3 Answers

No image display on screen


heres a good one: BUY A NEW ONE!!!!!!
(i dunno)

Oct 16, 2007 | Texas Instruments TI-85 Calculator

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