I've never dropped my 83 but the last time I turned it on, it displays random characters and pixel sometimes short lines. I can still perform calculations, but they are mostly obscured by these symbols, the same applies to nearly all aspects of the calculator including the graphing screen, programs, and apps.
I've had a similar problem in the past with my TI-86. It still happens sometimes when I don't use it for a while. To fix it, all I did was set the screen to its darkest setting and left it on for 10 minutes (keep it from turning itself off, by pushing buttons every few minutes.) It works great, and the calculator is fine unless you leave it unused for a month or so. A similar solution may work for you.
Posted on Jul 10, 2007
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