Compaq 247320-003 - Deskpro 4000 - 5166 Model 2500/CDS Reference Manual page 34

To change the power-on or setup password, complete the
following steps:
1. Turn on the computer.
2. When the key icon appears, type your current password, a
slash (/) or alternate delimiter character, your new
password, another slash (/) or alternate delimiter character,
and your new password again as shown:
current password/new password/new password
Refer to the "National Keyboard Delimiter Characters"
section in this chapter for information about the alternate
delimiter characters.
Type carefully; for security reasons, the characters you
type do not appear on the screen.
Completing this procedure causes the new password to take
effect the next time you turn on the computer.
To delete the power-on or setup password, complete the
following steps:
1. Turn on the computer.
2. When the key icon appears, type your current password
followed by a slash (/) or alternate delimiter character as
shown:
Refer to the "National Keyboard Delimiter Characters"
section in this chapter for information about alternate
delimiter characters.
Completing this procedure deletes the password until you
establish a new one through Security Management.