Haven't heard of a flashing 0 before but since the hard reset didn't fix it, I'd say faulty memory battery or stuck printer. This company has service manuals which might help https://the-checkout-tech.com/manuals/cashregisters/Uniwell1.php
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Haven't heard of a flashing 0 before but since the hard reset didn't fix it, I'd say faulty memory battery or stuck printer.
This company has service manuals which might help https://the-checkout-tech.com/manuals/cashregisters/Uniwell1.php