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

why does the error code E1 show on the screen and a high pitched noise occurrs when the till is switched on
make SAMSUNG ER-5140
Gina, May 2022


done
https://www.fixya.com/support/t6815645-fix_e1_error_samsung_er_5140#answer13116798

Ffui, May 2022
link Click here to see other fixes for Samsung.