You can reset all variables, without losing all your programs. you can hit 2nd>Mem(plus symbol)>reset>All ram Then verify that you wish to do so... It should reset to a working condition... If it doesn't then you may need to lose your programs in order to get your calc to a working condition.
The same thing happened to me and my calculator.
How
Thank you! Thank you!!!!!
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Thank you so much! You are amazing!
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