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does not print full amount on till entry?

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

Paper in my Samsung ER4915 jammed. Now it doesn't work at all?

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

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My Samsung ER 650 screen is black?

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

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

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

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