which password should i enter?/what am i supposed to do in this case?

Question

my presario cq57,serial: 5cb2123k08,product: a9b02ea#acq,warranty:1y1y0y,model cq57-447s,rev 3672-120 pcid:0690120000204910000600100 notebook is blank only written "enter administrator password or power on password" & when I press some of the buttons they bip.