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urgent!!!hp 10bII + Financial Calculator cannot fuction

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hp 10bII + Financial Calculator

My calculator displays 3 zeros and the downward and upward sign on the screen. Thats all it displays, the bottons are not working. I tried everything in terms of resetting it nothing works help. can anyone tell me why? 

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Please post a picture. What you are describing does not make sense as there is no UP/DOWN indicator on the 10bIi+ to my knowledge. With that, I can probably help since I was the person that basically made all the software inside the 10bII+. 🙂



Did you replace the 2 battery yet? That is always a good place to start.


Although I work for the HP calculator group as a head developer of the HP Prime, the views and opinions I post here are my own.
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