Compaq Armada 7400 Reference Manual page 87

The power-on password prevents unauthorized use of the
computer when it is turned on, restarted, or resumed from Suspend
or Hibernation.
To set the power-on password:
1. Run Computer Setup.
2. Select the System Features icon.
3. Select the Security Management menu.
4. Under Power-On Password, select Set.
5. Enter your new power-on password. (You may use up to eight
alphanumeric characters, and you may use the same password
you are using for the setup password.)
6. Enter the password again to verify it.
7. If you want to require entry of a password whenever the
computer is turned on, enter an X next to Enable Password to
Power-On.
8. Select OK.
9. Select Exit.
10. Select the Save option.
Once the power-on password is set, you must enter it every time
you turn on or restart the computer or resume from Hibernation,
Suspend, or QuickLock/QuickBlank.
Security