8 IBM Desktop System HMM
Power-On Password
A power-on password denies access to the system by
an unauthorized user when the system is powered
on. When a power-on password is active, the
password prompt appears on the screen each time
the system is powered on. The system starts after the
proper password is entered. See “Power-On
password” on page 22 for more information about
how to change, remove and set password in BIOS
Setup.
In some cases, you might be required to service a
system with an active and unknown power-on
password. To clear a password from the system,
follow these steps.
1. Turn off system unit.
2. Unplug power cable from the electrical outlet.
IMPORTANT: Do not attempt these steps with the
power cord plugged into the electrical outlet.
The power supply maintains +5 Vdc of standby
power when the power cord is plugged.
System damage might result if the power cord
is not unplugged during jumper setting.
3. Set JP7 to 2-3 position to clear BIOS setting as
original manufacture setting. See “System Board
Jumpers and Connectors” on page 105.
4. Plug power cable, turn on the system, and
complete the BIOS clear procedure.
5. Turn off the system, unplug power cable from
electrical outlet.
6. Set JP7 to the 1-2 position to enable password
check process. See “System Board Jumpers and
Connectors” on page 105.
IMPORTANT: To reinstall the password, the user
must enter a password in the Setup Utility. If
Enhanced Security is enabled and the password is
forgotten, the system board must be replaced .