When Using Your Computer; When Working Inside Your Computer - Dell OptiPlex 270 Service Manual

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CAUTION: Safety Instructions
Dell™ OptiPlex™ GX270 Service Manual
General
When Working Inside Your Computer
Protecting Against Electrostatic Discharge
Battery Disposal
Use the following safety guidelines to help ensure your own personal safety and to help protect your computer and working environment from potential
damage.
General
Do not attempt to service the computer yourself unless you are a trained service technician. Always follow installation instructions closely.
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To help prevent electric shock, plug the computer and device power cables into properly grounded electrical outlets. These cables are equipped with
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3-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove the grounding prong from a cable. If you must use an extension
cable, use a 3-wire cable with properly grounded plugs.
To help avoid the potential hazard of electric shock, do not use your computer during an electrical storm.
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To help avoid the potential hazard of electric shock, do not connect or disconnect any cables or perform maintenance or reconfiguration of this product
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during an electrical storm.
If your computer includes a modem, the cable used with the modem should be manufactured with a minimum wire size of 26 American wire gauge
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(AWG) and an FCC-compliant RJ-11 modular plug.
Before you clean your computer, disconnect the computer from the electrical outlet. Clean your computer with a soft cloth dampened with water. Do
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not use liquid or aerosol cleaners, which may contain flammable substances.
To help avoid possible damage to the system board, wait 5 seconds after turning off the computer before disconnecting a device from the computer.
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To avoid shorting out your computer when disconnecting a network cable, first unplug the cable from the network adapter on the back of your
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computer, and then from the network jack. When reconnecting a network cable to your computer, first plug the cable into the network jack, and then
into the network adapter.
To help protect your computer from sudden, transient increases and decreases in electrical power, use a surge suppressor, line conditioner, or
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uninterruptible power supply (UPS).
Ensure that nothing rests on your computer's cables and that the cables are not located where they can be stepped on or tripped over.
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Do not push any objects into the openings of your computer. Doing so can cause fire or electric shock by shorting out interior components.
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Keep your computer away from radiators and heat sources. Also, do not block cooling vents. Avoid placing loose papers underneath your computer;
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do not place your computer in a closed-in wall unit or on a bed, sofa, or rug.
When Using Your Computer

When Working Inside Your Computer

Before you open the computer cover, perform the following steps in the sequence indicated.
CAUTION: Do not attempt to service the computer yourself, except as explained in your online Dell™ documentation or in instructions otherwise
provided to you by Dell. Always follow installation and service instructions closely.
NOTICE: To help avoid possible damage to the system board, wait 5 seconds after turning off the computer before removing a component from the
system board or disconnecting a device from the computer.
1. Perform an orderly computer shutdown using the operating system menu.