Dell OptiPlex GX50 Setup And Quick Reference Manual

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24 Setup and Quick Reference Guidew w w . d e l l . c o m | s u p p o r t . d e l l . c o m 3 Disconnect your computer and peripherals from their power sources.Also, disconnect any telephone or telecommunication lines from thecomputer..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 networkcable, first unplug the cable from the network interface controller(NIC) on the back of your computer, and then from the network jackon 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 withlocking tabs; if you are disconnecting this type of cable, press in on thelocking tabs before disconnecting the cable. As you pull connectorsapart, keep them evenly aligned to avoid bending any connector pins.Also, before you connect a cable, make sure both connectors arecorrectly oriented and aligned.• Handle components and cards with care. Do not touch thecomponents or contacts on a card. Hold a card by its edges or by itsmetal mounting bracket. Hold a component such as a microprocessorchip by its edges, not by its pins.When Using Your Computer SystemAs 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 selectionswitch on the power supply is set to match the AC power available atyour location:– 115 volts (V)/60 hertz (Hz) in most of North and South Americaand some Far Eastern countries such as South Korea and Taiwan