IBM Aptiva 2158, Техническое обслуживание оборудования

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General Information 9
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 20 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.
WARNING: Do not attempt these steps with the power cord plugged into the
electrical outlet. The power supply mai5 Vdc of standby power
when the power cord is plugged. System damage might result if the
power cord is not unplugged during testing.
Machine Type 2158: Set switch 2 of SW2 to the OFF position to bypass
password check process. See “Machine Type 2158 System Board Jumpers
and Connectors” on page 131.
Machine Type 2163 and 2164: Set switch 5 of SW1 to the ON position to
bypass password check process. See “Machine Type 2163 and 2164 System
Board Jumpers and Connectors” on page 135.
3. Plug power cable, turn on the system, and depress F1 during POST to enter
BIOS Setup menu.
4. Select “Advanced Options”, then enter “Security Options” and set “Power
On Password” setting to “None” to clear password.
5. Save and exit from BIOS Setup.
6. Turn off the system, unplug power cable from electrical outlet.
Machine Type 2158: Set switch 2 of SW2 to the ON position to enable
password check process. See “Machine Type 2163 and 2164 System Board
Jumpers and Connectors” on page 135.
Machine Type 2163 and 2164: Set switch 5 of SW1 to the OFF position to
enable password check process. See “Power Supply Connectors and
Voltages” on page 138.
IMPORTANT: To reinstall the password, the user must enter a password in the
Setup Utility.