How to mend Samsung Sp-s520

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

does not print full amount on till entry?

samsung er290 cash register?

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

Samsung er290?

How do I mend Samsung ER4615?

How do I clear an error code pp?

Samsung ER 4915 not working?

Memory All Clear a Samsung ER-4615?

Samsung er4615 closed?

Battery?

clear E3 error code on samsung er-290 cash register?

Cash Register?

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

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

can non-upc codes function be disabled for samsung sps 520 register?

my samsung er-150 cash register makes a high pitched alarm sound on switch ?

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

How can i clear extra lines appearing on screen?

Samsung ER-5100?

closed message? samsung er-4615?

fixing key issues on a samsung ER 5100?

how can i fix my Samsung ER290 cash register?

cash registers ER-4615?

samsung er150?

change tax for er4940 samsung?

I need to reset my Samsung Cash Register?

samsung 4615 cash reg ?

My Samsung ER 650 screen is black?

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