Question about Texas Instruments TI-85 Calculator

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TI-85 Calculator's LCD Display if faded

I bought my TI-85 in 1995. I have not used it in several years. I just refreshed the batteries and noticed that the LCD display is faded I can't see anything but a faded blip on the display, so I know that it is on. I remember that back in the days I used to press the blue button and the UP arrow and that used to brighten up the LCD display, however that does not do anything to fix this problem. PLEASE ADVICE WHAT TO DO. Thank you!

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  • Javier Medina
    Javier Medina Jan 13, 2009

    I did a little research on the Texas Instruments Website  and here is the answer.


    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.





    http://epsstore.ti.com/OA_HTML/csksxvm.j...

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I did a little research on the Texas Instruments Website  and here is the answer. 
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. 
http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=85103&nUsePub=NO&jttst0=6_23871,23871,-1,0,&jtfm0=&etfm1=&jfn=ZG57C2FA762C0BEC303F5B74A9018844AE124A5516274A019AFE22BA90B20

Posted on Jan 14, 2009

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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.

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