When Using Your Computer System - Dell OptiPlex GX240 Setup And Quick Reference Manual

24 Setup and Quick Ref erence Guide
Doing so reduces the potential for personal injury or shock.
In addition, take note of these safety guidelines when appropriate:
• To avoid shorting out your computer when disconnecting a network
cable, first unplug the cable from the network interface controller
(NIC) on the back of your computer, and then from the network jack
on the wall. When reconnecting a network cable to your computer,
first plug the cable into the network jack, and then into the NIC.
• When you disconnect a cable, pull on its connector or on its strain-
relief loop, not on the cable itself. Some cables have a connector with
locking tabs; if you are disconnecting this type of cable, press in on the
locking tabs before disconnecting the cable. As you pull connectors
apart, keep them evenly aligned to avoid bending any connector pins.
Also, before you connect a cable, make sure both connectors are
correctly oriented and aligned.
• Handle components and cards with care. Do not touch the
components or contacts on a card. Hold a card by its edges or by its
metal mounting bracket. Hold a component such as a microprocessor
chip by its edges, not by its pins.

When Using Your Computer System

As you use your computer system, observe the following safety guidelines.
CAUTION: Do not operate your computer system with any cover(s)
(including computer covers, bezels, filler brackets, and front-
panel inserts) removed.
• To help avoid damaging your computer, be sure the voltage selection
switch on the power supply is set to match the AC power available at
your location:
– 115 volts (V)/60 hertz (Hz) in most of North and South America
and some Far Eastern countries such as South Korea and Taiwan
– 100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan
NOTE: The voltage selection switch must be set to the 115V position
even though the AC supply in Japan is 100 V.
– 230 V/50 Hz in most of Europe, the Middle East, and the Far East
Also be sure your monitor and attached peripherals are electrically
rated to operate with the AC power available in your location.