IBM F50 RS/6000 7025 - Manual (Page 83)

After you have entered and verified the password, the privileged-access password
icon flashes and changes to the locked position to indicate that your computer now
requires the password you just entered before running system programs.
Note: If you forget the power-on password, you have to remove the battery for at
least 30 seconds to disable this password. See Appendix B, “Replacing the
Battery” on page B-1 for details.
Chapter 3. System Management Services 3-15