IBM RS/6000 44P 270 Service Manual page 214

Enter Password
Press Enter when you are finished; you must type the password again for verification.
Verify Password
If you type the password incorrectly, press the Esc key and start again.
If the two password entries do not match, an error icon appears with an error code:
20E00000.
Note: After you have entered and verified the password, the power-on access
If you previously had set a power-on-access password and want to remove it, select the
Remove icon.
After you have selected the remove icon, the power-on-access status icon flashes and
changes to the unlocked position to indicate that the power-on-access password is not
set.
Note: If you forget the power-on access password, you can erase the password by
A password becomes effective only after the system is turned off and back on again.
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Service Guide
password icon flashes and changes to the locked position to indicate that your
system unit now requires the password you just entered during the power on
process.
shutting down the system unit and removing the battery for at least 30 seconds.
The system unit power cable must be disconnected before removing the battery.