Texas Instruments TI89 - OVERHEAD VIEWSCREEN Support Questions

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Myi Ti 89 Titanium Is Stuck On Busy
hi i my calculator ti 89 titanium is not working i cannot scroll down and whenever i press the 2nd b...

Privilege Violation???
I don't know why but in my Ti-89 titanium there is just "Privilege violation" in the top and I can't...

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