Dell OptiPlex GX1p - Manual (Page 45)

Num Lock
Num Lock determines whether your system boots with the Num Lock mode activated on 101- or 102-key keyboards (it does not apply to 84-key
keyboards).
When Num Lock mode is activated, the rightmost bank of keys on your keyboard provides the mathematical and numeric functions shown at the
tops of the keys. When Num Lock mode is turned off, these keys provide cursor-control functions according to the label on the bottom of each key.
Chassis Intrusion
Chassis Intrusion displays the status of the system chassis intrusion monitor. The settings for this option are Enabled, Enabled-Silent, or Disabled.
The default is Enabled.
If the computer cover is removed while the intrusion monitor is set to Enabled, the setting changes to Detected, and the following message
appears during the boot sequence at the next system start-up:
Alert! Cover was previously removed.
If the computer cover is removed while the intrusion monitor is set to Enabled-Silent, the setting changes to Detected, but the alert message is not
displayed during the boot sequence at the next system start-up.
If the intrusion monitor is set to Disabled, no intrusion monitoring occurs and no messages are displayed.
To reset the Detected setting, enter the System Setup program during the system's power-on self-test (POST). Highlight the Chassis Intrusion
option and press the left- or right-arrow key to choose Enabled, Enabled-Silent, or Disabled.
DAC Snoop
DAC Snoop lets you correct video problems that may occur when certain video add-in cards are used. The default is Off. If you are using a video
add-in card and problems such as incorrect colors or blank windows occur, set DAC Snoop to On.
ACPI
This option controls the operation of the system's Advanced Configuration and Power Interface (ACPI) feature.
When ACPI is set to On, momentarily pressing the power button places the system in a power-saving mode. To turn the system off completely,
press the power button for more than 4 seconds. When ACPI is set to On, interrupt request (IRQ) line 9 is not available for use by an expansion
card.
When ACPI is set to Off, momentarily pressing the power button turns off the system completely. With this setting, IRQ9 is available for use by an
expansion card.
Keyboard Errors
Keyboard Errors enables or disables reporting of keyboard errors during the POST, which is a series of tests that the system performs on the
hardware each time you turn on the system or press the reset button.
This option is useful when applied to self-starting servers or host systems that have no permanently attached keyboard. In these situations,
selecting Do Not Report suppresses all error messages relating to the keyboard or to the keyboard controller during POST. This option does not
affect the operation of the keyboard itself if a keyboard is attached to the computer.
System Password
System Password displays the current status of your system's password security feature and allows you to assign and verify a new password. No
one can assign a new password unless the current status is Not Enabled, which is displayed in bright characters.
The settings for the System Password option are:
l Not Enabled (the default option)
l Enabled
l Disabled by Jumper
Password Status
When Setup Password is set to Enabled, Password Status allows you to prevent the system password from being changed or disabled at system
start-up.
To lock the system password, you must first assign a setup password in the Setup Password option and then change the Password Status option
NOTE: When the setup password is enabled, you must enter the setup password before you can reset the Chassis Intrusion option.
NOTE: Read " Using the System Password Feature " found later in this chapter for instructions on assigning a system password and
using or changing an existing system password. See " Disabling a Forgotten Password " found later in this chapter for instructions on
disabling a forgotten system password.