2nd and up arrow doesnt brighten screen

2nd and up arrow doesnt brighten screen I have changed batteries and 2d and up arrow doesnt increase contrast!!
Asked by: Guest \| Views: 157

Total answers/comments: 1

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Guest [Entry]

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

if it did, please hit accept answer button!"