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The TI-84 Plus Silver Edition is a graphing calculator released in 2004. It includes a USB port, pre-loaded software, APPS, storage, and a removable front and back case.

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OS needs to be replaced

I tried to update the operating system on a TI-84 Plus C. It is messed up now.

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Exactly how is it messed up?

Try using recovery to update it again: https://youtu.be/8HlPgS0elRM?t=624 be sure to send OS 2.55mp

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