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  • Information
    HP fraudulent caller alert - protect yourself from scams

    Learn what to do if you are contacted by fraudulent callers posing as HP representatives. This could be a scam; do not provide any personal information.

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HP 9S Calculator - Resetting the Calculator

The instructions below explain how to restore the HP 9S calculator to normal operation.
Clearing
If there is an overflow or error indicator on the display of the calculator, clear it by pressing the ON/C key.
Resetting
If the calculator locks up, and pressing keys has no effect, press M+ and ENG at the same time. This unlocks the calculator and returns all settings to their default values.

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Support Forum

Support Forum

Join the conversation! Find Solutions, ask questions, and share advice with other HP product owners. Visit now


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Country: Flag United States

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