i have a er-3720 register with an e-12 code how do i fix this proble ?

Till roll not printing properly?

how do reset the default program on a er-4940 cash register?

how to fix printing problem on er 4900?

fix a printer motor locking on an er 1970?

how to change the tax rate on er-4940?

er420m sequence error clearance caused all information to be cleared how do?

Reset my till without c key?

"not assigned" displayed?

sequence error?

er-150|| how to get company name on till???????????????????????????????????

how to set time in er-a330 cash machine???

how to clear a open cover error?