E Appears At The Corner Of Screen And Not Able To Punch Any Numbers Cash Register

Chosen Solution

“E” appears at the corner of screen and not able to punch any numbers and beeps until I hit PLU/SUB button an noise goes away. This is happening in Sharp ER-A320 cash register.

I do not know this item, but the easy fix is a power reset. Unplug for 30 sec the replug power. If that doesn’t do it, it may be indicating a drawer jam. other than that, it would be a more serious internal problem.