yes they do work if the cd is spinning but not reading try lifting the front of the player up at a slight angle or try writing rom file to a cdrw instead i have sucessfully upgraded 10 machines with this file the last one i done took approx 10 gos for it to read the cd best thing to try if you have a vcd on a cdr put it it let it play for 3 mins press eject put the bank30 rom cd in press close and wait .