you have to clean memory you can consult manual on the commercial page there is the manual in Spanish if you can't contact me and I give you the steps to follow For now, just turn the key to the blind position, that is, as if it were a turn, turn Asia your right until you reach six, press and hold the delete and / or double zero key while continuing to press the key connects the machine will give you a ticket after that turn the key to R and it looks like factory