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validation required?

when i try to log on to my sam4s sps-500 cash register, i get a error message "validation requited". i can not do anything.
daniel, May 2013
It sounds like someone has programmed the machine for check validation. I haven't worked with this series but there are manuals here:

OPERATION MANUAL

http://the-checkout-tech.com/manuals/cashregisters/Samsung_SPS-500_operator_manual.html

PROGRAMMING MANUAL

http://the-checkout-tech.com/manuals/cashregisters/Samsung_SPS-500_programming_manual.html

Registerman, May 2013