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10. Locate the 2-pin password jumper on the system board (see System Board Components), and then reinstall the
jumper plug to enable the password feature.
11. Replace the computer cover (see Replacing the Computer Cover).
12. Connect your computer and devices to electrical outlets, and then turn them on.
Clearing CMOS Settings
1. Follow the procedures in Before You Begin.
2. Remove the computer cover (see Removing the Computer Cover).
3. Locate the password (PASSWORD) and CMOS (RTCRST) jumpers on the system board (see System Board
Components).
4. Remove the password jumper plug, then place the plug on the CMOS jumper pins and wait approximately 5
seconds.
5. Remove the jumper plug from the CMOS jumper pins, and then reinstall the plug on the password jumper pins to
enable the password feature.
6. Close the computer cover (see Replacing the Computer Cover).
7. Connect your computer and devices to electrical outlets, and then turn them on.
Cleaning Your Computer
Computer, Keyboard, and Monitor
Use a vacuum cleaner with a brush attachment to gently remove dust from the slots and holes on your computer
and from between the keys on the keyboard.
To clean your monitor screen, lightly dampen a soft, clean cloth with water. If possible, use a special screen-
cleaning tissue or solution suitable for the monitor's antistatic coating.
Wipe the keyboard, computer, and plastic part of the monitor with a soft cleaning cloth moistened with water.
Do not soak the cloth or let water drip inside your computer or keyboard.
Mouse
If your screen cursor skips or moves abnormally, clean the mouse. To clean a non-optical mouse:
1. Turn the retainer ring on the underside of your mouse counterclockwise, and then remove the ball.
2. Wipe the ball with a clean, lint-free cloth.
NOTICE: The password jumper plug must be reinstalled on the password jumper pins in order to enable the
password feature.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the
computer.
NOTE: In system setup (see Entering System Setup), both system and administrator password options appear as
Not Set. The password feature is enabled but a password is not assigned.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide.
NOTE: This procedure does not clear or reset system and setup passwords.
NOTICE: The password jumper plug must be reinstalled on the password jumper pins in order to enable the
password feature.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the
computer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide.
CAUTION: Before you clean your computer, disconnect the computer from the electrical outlet. Clean
your computer with a soft cloth dampened with water. Do not use liquid or aerosol cleaners, which
may contain flammable substances.
NOTICE: Do not wipe the display screen with any soap or alcohol solution. Doing so may damage the antiglare
coating.
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Documentation
6.07.2007
http://support.euro.dell.com/support/edocs/systems/720H2C/en/OM/appendix.htm