We may have found other answers which could help you.
Click here for Cash Register 290
How to fix it?
Programming SAM4S cash register till receipt?
My sam4s Er-5200 sequence error will not go off ?
How to program % discount on Sam4s ER-5200?
Our Sam4S ER5100 has high pitched noise on switch on?
how can i fix my sam4s er420m?