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Our Sam4S ER5100 has high pitched noise on switch on?

Also show error code SP
David, October 2017
Someone has programmed it to require validataion before continuing. Turn this off in the program.
If you don't have a manual, there is one on the net here:

https://the-checkout-tech.com/manuals/cashregisters/Samsung_ER-5100_operating_programming_manual.html

Registerman, December 2017