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My HP12C is stuck on 0.00 D.MY and won't turn

My HP12C is stuck on 0.00 D.MY and won't turn on or off? I just put new batteries in and nothing?

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Put in new battery and it won't turn on

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If this camera takes ordinary batteries you may have inserted them the wrong way around.
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The display on my HP12C shows 0,00 instead of 0.00. Can you help me fix it? Thank you! Rebecca Loughlin

To switch the radix point between the US and European modes, press and hold the decimal point key, press and release the ON key, then release the decimal point key.

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Here is the link to one earlier post where I show how to test proper operation of the calculator. I invite you to read it.

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