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TI-84 Plus calculator support.

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Why does my display have these black lines?

I replaced the batteries already and also tried resetting ram so I think this might be a mother board problem. How ever when I graph it looks alright so i don’t think it’s display issues

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Even though it's not present when you graph, it's still ribbon cable failure. Unfortunately, unless you have a soldering iron, there’s nothing you can do to fix it. There’s a guide over on the Cemetech (calculator forum) that addresses this: https://www.cemetech.net/forum/viewtopic...

The TI-84 Plus is far more difficult to fix than the TI-83 Plus. However, if you're experienced, there's a tutorial here: https://youtu.be/b5ym1xhbJjc

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Tai Nguyen Anh sarà eternamente grato.
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