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When you disconnect a cable, pull on its connector or on its
Handle components with care. Hold a component such as a memory module by its edges, not its pins.
When removing a memory module from the system board or disconnecting a peripheral device from the computer, wait 5 seconds after turning off the com- puter before removing the memory module or disconnecting the device to help avoid possible damage to the system board.
Before you clean your computer, turn it off, unplug it from its power source, and remove the battery pack(s).
Clean your computer with a soft cloth dampened with water rather than with liq- uid or aerosol cleaners.
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.hese chapters a
•If your computer gets wet or is damaged, follow the procedures described in Chapter 2, “Troubleshooting Your Computer.” If, after following these proce- dures, you confirm that your computer is not operating properly, contact Dell Computer Corporation. (See Chapter 4, “Getting Help,” for the appropriate tele- phone number.)
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:
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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 cur- tains 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 com- fortable 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
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