Question about Texas Instruments TI-83 Plus Calculator

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Screen Gibberish My Ti-83+ is about 6 years old but not until a couple of days ago did this problem occur. I turned it on to find gibberish all over the screen. I pressed clear without any luck. I changed the batteries, cleared the ram, pulled all the batteries including the lcd and let it sit overnight, and updated the OS via another TI-83+. Nothing has worked so far. Any thoughts?

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  • Anonymous Sep 04, 2008

    Ditto.  I have had this problem for months and I really don't want to buy a new calculator.

  • VT Hokie Sep 14, 2008

    Yeah, I ended up contacting TI and they sent me to their trouble shooting page which contained everything I had already done, clear the ram, reinstall the OS etc. They also mentioned that since my calculator was so old, they could not do anything for me. So I ended up just buying a new one. Thanks for all the input.

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You dropped your calculator one too many times, or the solder joints broke some other way. Get a soldering iron, liquid flux, and solder and resolder all of the chips on the mainboard.

Posted on Apr 27, 2011

  • Chris M. Apr 27, 2011

    Another common cause is the white flex cable connecting the LCD to the main board. Peel that off of the board (it isn't soldered), tin all of the pads and solder wires onto them in place of the flex cable. Try this first, since the cable is folded, and over time the connection breaks at the fold.

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This is by no means an official opinion, but I'm almost 100% certain that this happens when memory on the calculator fries. When the processing chip tries to read information stored in memory telling it what to print on the screen, the memory returns incorrect values and as a result areas of the screen which are supposed to be empty have pixels filled in and vice-versa (depening on how much of the memory has failed).

This exact same problem happened on my laptop computer (with video memory) a couple of weeks ago and it turned out to be both a problem with the video memory failing, as well as the video interface on the mainboard.

Once again, I haven't called TI yet to confirm this, but I'm nearly 100% certain that this problem is caused by bad memory sectors.

TI MIGHT replace a calculator if it has this issue, or maybe repair it for less than the cost of buying a new one. I'm not sure yet; this problem just happened to me and tech support isn't open till monday.

Posted on Sep 06, 2008

Wow, I'm in the exact same situation. I've had my trusty TI for 6 years and now all of a sudden this gibberish is on the screen. You're right, there is absolutely nothing you can do to fix it. Guess we'll have to bite the bullet and buy a new one. 

Posted on Sep 05, 2008

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