... ,then open the switch(on back machine. red color), input four passwords (1,2,3,4 )reveal working ... then open the switch(on back machine. The red color), input four old passwords 1, 2, 3, 4 , ... then input four new passwords, confirm the four new password again. Then new password is ... then open the switch(on back machine. red color) , input four passwords. The number of times is deletedAttention: ...