I have a Toshiba Satellite L300-20D SYSTEM UNIT MODEL NUMBER PSLB8E - 0CK00YEN
When I switch on i get a black screen with a blue rectangle saying 'Enter Current Password'
No passwords seen to work and I have tried to restore by holding '0' then pressing start button whilst holding down the'0' button but still the 'Enter Current Password' comes on!!
If you google 'toshiba laptop enter current password', there are lots of videos that suggest ways to clear the BIOS password when this happens. Have a read while we wait to see if any more specific advice is forthcoming!