Dell DIMENSION 8400 Manual

Also see for Dimension 8400 Series: Setup Quick reference guide Service manual

Contents

Dell DIMENSION 8400 Manual Manual pdf 64 page image

64 Removing and Installing Partsw w w . d e l l . c o m | s u p p o r t . d e l l . c o m Before Working Inside Your ComputerUse the following safety guidelines to help protect your computer from potential damage and tohelp ensure your own personal safety.CAUTION: Before you begin any of the procedures in this section, follow the safety instructionslocated in the Product Information Guide.CAUTION: Handle components and cards with care. Do not touch the components or contacts on acard. Hold a card by its edges or by its metal mounting bracket. Hold a component such as a processorby its edges, not by its pins.NOTICE: Only a certified service technician should perform repairs on your computer. Damage due toservicing that 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 cableitself. Some cables have a connector with locking tabs; if you are disconnecting this type of cable, pressin on the locking tabs before you disconnect the cable. As you pull connectors apart, keep them evenlyaligned to avoid bending any connector pins. Also, before you connect a cable, ensure that bothconnectors are correctly oriented and aligned.NOTICE: To avoid damaging the computer, perform the following steps before you begin working insidethe computer.1 Turn off your computer (see page 63).NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug itfrom the network device.2 Disconnect any telephone or telecommunication lines from the computer.3 Disconnect your computer and all attached devices from their electrical outlets, and thenpress the power button to ground the system board.CAUTION: To guard against electrical shock, always unplug your computer from the electrical outletbefore opening the cover.4 Open the computer cover (see page 73).NOTICE: Before touching anything inside your computer, ground yourself by touching an unpaintedmetal surface, such as the metal at the back of the computer. While you work, periodically touch anunpainted metal surface to dissipate any static electricity that could harm internal components.