<!-- from fixya rte -->How do i reset verifone vx520 - Retail Supplies

1) Press [F2] + [F4]
2) Password = 1 [ALPHA] [ALPHA] 66831 (or Z66831) and press [Enter]

you then will have to select a Menu Mode, which one depends ENTIRELY on what program is in your terminal....i.e. Who your Credit Card Processor is. You should contact their cust support for assistance in programming that terminal correctly.