Dell Dimension 9200 Owner's Manual

Also see for 9200: Owner's manual Setup guide Owner's manual Getting started guide Service manual

Contents

78 Removing and Installing PartsBefore Working Inside Your ComputerUse the following safety guidelines to help protect your computer from potential damage and to helpensure your own personal safety.CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold acard by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by itspins.CAUTION: When working inside the computer, be aware that the processor heat-sink assembly, power supply,graphics card, and other components may be very hot during normal operation. Be sure that they have sufficienttime to cool before you touch them.NOTICE: Only a certified service technician should perform repairs on your computer. Damage due to servicingthat is not authorized by Dell is not covered by your warranty.NOTICE: 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 lockingtabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending anyconnector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and aligned.NOTICE: To avoid damaging the computer, perform the following steps before you begin working inside thecomputer.1 Turn off your computer (see "Turning Off Your Computer" on page 77).NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from thenetwork wall jack.2 Disconnect any telephone or telecommunication lines from the computer.3 Disconnect your computer and all attached devices from their electrical outlets, and then press thepower button to ground the system board.NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface,such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface todissipate any static electricity that could harm internal components.Removing the Computer CoverCAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet beforeremoving the cover.