Dell 720H2C Personal Computer User Manual


 
7. Disconnect the keyboard and mouse, then disconnect the computer and monitor from their electrical outlets.
8. Press the power button on the computer to ground the system board.
9. Open the computer cover (see Removing the Computer Cover).
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
l 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.
l 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.
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.