Pass word. i had a toshiba 4300 given to me but it has a pass word request when i turn it on. The

Question

i had a toshiba 4300 given to me but it has a pass word request when i turn it on. The person who gave it to me couldnt figure it out thats why i have it .Can you tell me if its possible to by pass . I know in desktops it can be done by changing the location of a  push on plug and then reboot and then put in back as it was. but i have no idea how it works on a laptop.