Technical Reference Guide
4.7 SYSTEM MANAGEMENT
This section describes functions having to do with security, power management, temperature, and
overall status. These functions are handled by hardware and firmware (BIOS) and generally
configured through the Setup utility.
4.7.1 SECURITY FUNCTIONS
These systems include various features that provide different levels of security. Note that this
subsection describes only the hardware functionality (including that supported by Setup) and
does not describe security features that may be provided by the operating system and application
software.
4.7.1.1 Power-On Password
These systems include a power-on password, which may be enabled or disabled (cleared) through
a jumper on the system board. The jumper controls a GPIO input to the 82801 ICH2 that is
checked during POST. The password is stored in configuration memory (CMOS) and if enabled
and then forgotten by the user will require that either the password be cleared (preferable solution
and described below) or the entire CMOS be cleared (refer to section 4.6).
To clear the password, use the following procedure:
1. Turn off the system and disconnect the AC power cord from the outlet and/or system unit.
2. Remove the cover (hood) as described in the appropriate User Guide or Maintainance And
Service Guide. Insure that all system board LEDs are off (not illuminated).
3. Locate the password header/jumper (labeled E49 on these systems) and move the jumper
from pins 1 and 2 and place on (just) pin 2 (for safekeeping).
4. Replace the cover.
5. Re-connect the AC power cord to the AC outlet and/or system unit.
6. Turn on the system. The POST routine will clear and disable the password.
7. To re-enable the password feature, repeat steps 1-6, replacing the jumper on pins 1 and 2 of
header E49.
4.7.1.2 Setup Password
The Setup utility may be configured to be always changeable or changeable only by entering a
password. The password is held on CMOS and, if forgotten, will require that CMOS be cleared
(refer to section 4.6).
Compaq Deskpro and Evo Personal Computers
Featuring Intel Celeron and Pentium III Processors
Fifth Edition - March 2002
4-33
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