Question about Texas Instruments TI-85 Calculator

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Ti-85: Horizontal Line Across Screen - Battery Problem?

My screen just powers up to a horizontal line. Does the smaller backup battery need replacing? Is something else wrong? Thank you.

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Re: ti-85: Horizontal Line Across Screen - Battery...

I 'm confused about whether i have to place two kinds of batteries into ti 85 calculator both Cr1616 battery and AAA size batteries? BEcause when i place one of two kinds of batteries the screen did not turn on

Posted on Sep 18, 2008

Re: ti-85: Horizontal Line Across Screen - Battery...

I had that same prob, but i sent it in 4 repairs.
I took out the replacement battery, but it started up normal.

Posted on Jan 24, 2008

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Re: ti-85: Horizontal Line Across Screen - Battery...

Yes, the back up battery must be replaced.

Posted on Aug 27, 2007

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Horizontal blank line across ti 83 display please help

Press MODE on the calculator.
Select Full on the screen.
You should now have a full screen.

You could also reset the memory.


Press 2nd + (+) which is MEM
Go to Reset which should be number 7
Select All RAM which should be number 1
Press Reset which should be number 2

Mar 03, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I have a TI-83 that hasn't been used for a couple of years. I replaced tha 4 AAA batteries, turned on the calculator, but the screen just displayed one horizontal black line. I couldn't get it to respond...

Hope is what keeps the world turning.
Clean the electrical terminals even if they seem shiny. Use a clean eraser tip of a pencil.

Insert the main batteries.
If you see the line again, press [CLEAR] to see if it disappears.
Try resetting the RAM by pressing [2nd][MEM][7:Reset][1:All Ram][2:Reset] [ENTER][ENTER].

If screen is too light or too dark, adjust the contrast:
Press [2nd] key and release it
Press and HOLD Arrow (UP to darken, or DOWN to lighten) the screen.

If that does not solve the problem you may have to force the calculator to boot up. Details are in the article . Read the part on Ti83Plus family.
The article contains links to additional articles.
Hope it helps.

Oct 29, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

Screen displays small horizontal line when powered on that quickly fades away. Have changed batteries. When I do a reset (take one battery out, push delete while putting it back), the screen displays...

Here is what the Texas Instruments Knowledge Base has to say about your question.

I hope it helps.

Reinstalling the OS fot the TI84Plus

Howdo I correct the Error Waiting...Please Install Calculator SoftwareNowmessage on my TI-83 Plus family or TI-84 Plus family calculator?

If an operating system (OS) update fails or is interrupted, the calculator will be in an inoperable state with the message Waiting...Please install calculator software now.Themost common cause of a transfer being interrupted is updatingthe operating system on a calculator with low batteries. Users will needtouse the TI Connectivity cable and the TI Connect to sendthe operating system to the calculator. Make sure to have thelatest version of TI Connect installed on the computer.
In order to install the software please follow these steps:
1. Connect the TI Connectivity cable between the computer and the calculator.
2. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OSDownloader
3. Follow the on-screen directions to reinstall the calculator's OS.
If themessage "Error! Press any key to turn unit off. Then turn unit back on."appears on the graphing calculator, quickly, remove one battery from thecalculator and reinstall it while the transfer is taking place.

Oct 26, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

One horizontal line across the screen

Read this article for troubleshooting.
Hope it helps.

Oct 07, 2009 | Texas Instruments TI-83 Plus Calculator

3 Answers

Blank lines across the screen of a TI-86 graphing calculator

Try this, hook up new battery and go to MODE and darken and lighten the screen.. do it ten to fifteen times. if that doesn't help, try hook up most left and most right's battery terminal to a DC supply at 4.5V. dont go above 4.5 it will fry your calc (it is design to handle 3V). now you are forcing extra juice into the dead LCD screen lines... and reapeat the MODE + darken trick. I fixed mine like that! Works! and remeber to leave it completely black(darkest) for a while to keep that dead line alive!

Jul 06, 2009 | Texas Instruments TI-86 Calculator

1 Answer

Random screen

I'd try reinstalling. Can you connect to the computer and use ti connective software. You can download everything from the ti web site. need more help to step you through it email me at:

Aug 09, 2008 | Texas Instruments TI-83 Plus Calculator

4 Answers

Texas instruments ti-86 screen problem

The TI-86 uses a very small, very thin ribbon cable to connect the display board to the LCD. The cable is about 2.5 " wide and about 4" long, and is only slightly thicker than a piece of paper but has about 40+ leads buried inside. Over time the leads will break at the folds (there are at least two folds in this cable to fit it down inside the case). There is no cheap solution to fix this problem. You might have some "Mr. Fix-it" try to fix it, but he will tell you to throw it away after he renders it completely inoperable. The calculator uses two Torx bit screws at the bottom of the case (T-6 size) so you will have to get the correct screwdriver to open the case. Save your money, sanity and time and use it till you can't stand the missing lines and throw it out. Even the data cable looks like it is glued down so if it lifts off after being cooked or frozen a couple of dozen times in the back of your car you can't fix this.

Mar 28, 2008 | Texas Instruments TI-86 Calculator

1 Answer

TI-85 Display Has Missing Lines

have u ever modded it? it can (and probably will)damage the screen (graphics driver)

Oct 26, 2007 | Texas Instruments TI-85 Calculator

1 Answer

Won't power up, flat line across screen - battery problem?

Yes, this sounds like you'll need to replace your back-up batteries. That will probably resolve the problem.

Aug 03, 2007 | Texas Instruments TI-85 Calculator

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