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HP's expandable, RPN-based graphing calculator. Manufactured from 1990 until 2003.

What is invalid card data

when the calculator is turned on ,invalid card data appears.i have the survey gx and the 512k gx cards

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Danny Haley , This info. from HP support. The message Invalid card data appears when the calculator is not able to properly read data on the plug-in card. The card may not be correctly installed, or it may not be initialized. The trouble shooting link#1 below describes how to resolve this. Link #2 also has info. to share. Good luck.

I hope this helped you out, if so let me know by pressing the helpful button.

http://support.hp.com/us-en/document/bpi...

http://news.numlock.ch/it/hp-48g-how-to-...

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Danny Haley 영원히 감사할 것입니다.
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