•When preparing to remove a memory module from the system board or disconnect a peripheral device from the computer, turn off the computer, disconnect the AC adapter cable, and then wait 5 seconds before proceeding to help avoid possible damage to the system board.
•Clean the display with a soft, clean cloth and commercial window cleaner that does not contain wax or abrasives. Apply the cleaner to the cloth; then stroke the cloth across the display in one direction, moving from the top of the display to the bottom. If the display contains grease or some other contaminant, use isopropyl alcohol instead of commercial window cleaner.
•If your computer gets wet or is damaged, follow the procedures described in "If Your Computer Gets Wet" on page 56. If, after following these procedures, you confirm that your computer is not operating properly, contact Dell (see page 103 for the appropriate contact information).
Ergonomic Computing Habits
CAUTION: Improper or prolonged keyboard use may result in injury.
CAUTION: Viewing the display or external monitor screen for extended periods of time may result in eye strain.
For comfort and efficiency, observe the following ergonomic guidelines when setting up and using your computer:
•Position your computer directly in front of you as you work.
•Adjust the tilt of the computer’s display, its contrast and/or brightness settings, and the lighting around you (such as overhead lights, desk lamps, and the curtains or blinds on nearby windows) to minimize reflections and glare on the display.
•When using an external monitor with your computer, set the monitor at a comfortable viewing distance (usually 510 to 610 millimeters [20 to 24 inches] from your eyes). Make sure the monitor screen is at eye level or slightly lower when you are sitting in front of the monitor.
•Use a chair that provides good
•Keep your forearms horizontal with your wrists in a neutral, comfortable position while using the keyboard, touch pad, track stick, or external mouse.
Safety and EM C Ins tr uct ions : Port abl e Computer s
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