Mitsubishi Electric Apricot LS 550 Owner's Handbook Manual page 92

If the Password Prompt option is set to "Off", the user is not
prompted at all. The computer will boot (or if F1 is pressed during
start-up the BIOS Setup utility will start) and then wait for the user
to type the password and press ENTER. It is important that
authorised users of the computer are told to expect this, or they may
think that the computer has stopped working.
The user is allowed three attempts to enter the correct password. If
they fail the computer is "locked" and must be switched off.
Turning the computer on again restarts the sequence.
To delete a power-on password:
1. In the Power-on Password dialog, choose the Delete Power-on
2. Press
Administrator Password
The administrator password works in exactly the same way as a
power-on password. If you define both an administrator and a
power-on password, the computer only allows you to enter Setup if
you enter the Administrator's password.
Password option.
A dialog asks you to confirm that you want to delete the existing
power-on password.
to confirm.
ENTER
S y s t e m B I O S a n d S e t u p
LS/VS 550 OWNER'S HANDBOOK B/9