How to mend Samsung Ser 6500

how can i fix my Samsung ER290 cash register?

Memory All Clear a Samsung ER-4615?

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Why does the error code E1 show on screen and high pitched?

On screen is 'PCo' and nothing is functioning, how to correct?

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How do I get the register key to turn to "P" for updating the sales tax?

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I can't open the drawer. It has a squeal like a key is stuck?

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I need to reset my Samsung Cash Register?

Operator's Manual - Samsung ER-290 Electronic Cash Register?

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