IBM 300 Series 6268, Hardware Maintenance Manual

Page: 156 / 450

Power-on password:
A power-on password denies
access to the computer by an unauthorized user when the
computer is powered on. When a power-on password is
active, the password prompt appears on the screen each
time the computer is powered on. The computer starts
after the proper password is entered.
Removing a power-on password
To service a computer with an active and unknown
power-on password, power-off the computer and do the
following:
Attention
This procedure will remove the administrator
password. Also, this procedure will clear all setup
parameters, privilege access, and boot sequence
settings. Make sure these setting are recorded before
performing this procedure.
1. Unplug the power cord and remove the top cover.
2. Refer to “System board layout” on page 174 to find
the switch assembly 1 (SW1).
3. Move switch 2 (SW1-2) from the OFF position to the
ON (CMOS clear) position.
4. Power-on the computer. The system senses the
change in the position and erases the password.
5. There will be no video. Wait for the system to
produce two POST beeps, then power-off and unplug
the power cord.
6. Move switch 2 (SW1-2) from the ON (CMOS clear)
position to the OFF (original) position.
7. Power-on the system.
8. The system should now produce a video signal and
two POST beeps, along with a 162 configuration
error.
9. Reset the date and time and follow the on-screen
instructions to reconfigure the computer.
10. Remind the user to enter a new password when
service is complete.
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IBM PC 300/IntelliStation/Aptiva Vol 2 HMM