Dell OptiPlex 1U920, Setup And Quick Reference Manual, Page: 9 / 220

S e t u p a n d Q u i c k Re f e r e n c e G u i d e
7
CAUTION: Safety Instructions
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.
• To help prevent electric shock, plug the computer and device power cables into properly grounded
electrical outlets. These cables are equipped with 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.
• To help avoid the potential hazard of electric shock, do not connect or disconnect any cables or
perform maintenance or reconfiguration of this product 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 (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 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.