Released 1993, identified by word TI-82 labeled on upper right corner of the screen.

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2nd and up arrow doesnt brighten screen

I have changed batteries and 2d and up arrow doesnt increase contrast!!

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https://epsstore.ti.com/OA_HTML/csksxvm.... That should help.

if it did, please hit accept answer button!

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Irwin Kaufman will be eternally grateful.
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