HP kp721av Manuel D’Utilisation
Technical Reference Guide
www.hp.com
4-11
System Support
Power-On / Setup Password
These systems include a power-on and setup passwords, which may be enabled or disabled
(cleared) through a jumper on the system board. The jumper controls a GPIO input to the 82801
ICH10 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 4.4.1).
(cleared) through a jumper on the system board. The jumper controls a GPIO input to the 82801
ICH10 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 4.4.1).
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 Reference Guide. Insure that all system board LEDs are off (not illuminated).
3. Locate the password clear jumper (header is colored green and 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.
Setup Password
The Setup utility may be configured to be always changeable or changeable only by entering a
password. Refer to the previous procedure (Power On / Setup Password) for clearing the Setup
password.
password. Refer to the previous procedure (Power On / Setup Password) for clearing the Setup
password.
Cable Lock Provision
These systems include a chassis cutout (on the rear panel) for the attachment of a cable lock
mechanism.
mechanism.
I/O Interface Security
The SATA, serial, parallel, USB, and diskette interfaces may be disabled individually through the
Setup utility to guard against unauthorized access to a system. In addition, the ability to write to
or boot from a removable media drive (such as the diskette drive) may be enabled through the
Setup utility. The disabling of the serial, parallel, and diskette interfaces are a function of the SIO
controller. The USB ports are controlled through the 82801.
Setup utility to guard against unauthorized access to a system. In addition, the ability to write to
or boot from a removable media drive (such as the diskette drive) may be enabled through the
Setup utility. The disabling of the serial, parallel, and diskette interfaces are a function of the SIO
controller. The USB ports are controlled through the 82801.
Chassis Security
Some systems feature Smart Cover (hood) Sensor and Smart Cover (hood) Lock mechanisms to
inhibit unauthorized tampering of the system unit.
inhibit unauthorized tampering of the system unit.
Smart Cover Sensor
These systems include a plunger switch that, when the cover (hood) is removed, closes and
grounds an input of the 82801 component. The battery-backed logic will record this “intrusion”
event by setting a specific bit. This bit will remain set (even if the cover is replaced) until the
system is powered up and the user completes the boot sequence successfully, at which time the
bit will be cleared. Through Setup, the user can set this function to be used by Alert-On-LAN
and or one of three levels of support for a “cover removed” condition:
grounds an input of the 82801 component. The battery-backed logic will record this “intrusion”
event by setting a specific bit. This bit will remain set (even if the cover is replaced) until the
system is powered up and the user completes the boot sequence successfully, at which time the
bit will be cleared. Through Setup, the user can set this function to be used by Alert-On-LAN
and or one of three levels of support for a “cover removed” condition: