How to mend Error Samsung Cash

How can i clear extra lines appearing on screen?

Samsung er290?

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

How do I clear an error code pp?

I need to reset my Samsung Cash Register?

fixing key issues on a samsung ER 5100?

samsung 4615 cash reg ?

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

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

My Samsung ER 650 screen is black?

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

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

does not print full amount on till entry?

change tax for er4940 samsung?

Samsung ER 4915 not working?

How do I mend Samsung ER4615?

Samsung ER-5100?

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

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

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

how can i fix my Samsung ER290 cash register?

Battery?

samsung er150?

Memory All Clear a Samsung ER-4615?

cash registers ER-4615?

Cash Register?

Samsung er4615 closed?

samsung er290 cash register?

closed message? samsung er-4615?

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